Add minimum ruby version requirement
Add minimum ruby version requirement

This only specifies "1.9" rather than "1.9.3" since it appears 
that JRuby in 1.9 mode reports its version as "1.9", without 
the third version number segment.
drobune/mongoid,tagliala/mongoid,matsimitsu/mongoid,Exoth/mongoid,mschulkind/mongoid,KoanHealth/mongoid,colinyoung/mongoid,luxerama/mongoid,ganlron/mongoid,camallen/mongoid,johnnyshields/mongoid,77Agency/mongoid,dbkbali/mongoid,hashrocketeer/mongoid,narutosanjiv/mongoid,glebtv/mongoid,parov/mongoid,greggroth/mongoid,fredjean/mongoid,hxx/mongoid,robwil/mongoid,asaaki/mongoid,kayakyakr/mongoid,aj0strow/mongoid,asantamar/mongoid,manikandan-kandasamy/mongoid,mysociety/mongoid,tzar/mongoid,arnkorty/mongoid,jtescher/mongoid,kentaroi/mongoid,rinmu/mongoid,mikerobe/mongoid,abezzub/mongoid,asantamar/mongoid,hbakhtiyor/mongoid,charliehq/mongoid,nicolasblanco/mongoid,moretea/mongoid,jordoh/mongoid,mysociety/mongoid,kevinmarvin/mongoid,jonhyman/mongoid,Speakol/mongoid,joneslee85/mongoid,apptentive-engineering/mongoid,dustinwatson/mongoid,trmmy/mongoid,Exoth/mongoid,Subskii/mongoid,charliehq/mongoid,PerfectMemory/mongoid,sepastian/mongoid,kevinmarvin/mongoid,sideci-sample/sideci-sample-mongoid,zanker/mongoid,gullitmiranda/mongoid,sepastian/mongoid,rosylilly/mongoid,niedhui/mongoid,estolfo/mongoid,camallen/mongoid,krasnoukhov/mongoid,itbakery/mongoid,sideci-sample/sideci-sample-mongoid,tzar/mongoid,nullstyle/mongoid,Zhomart/mongoid,zaithottakath/mongoid,tombruijn/mongoid,shotoso/mongoid,kslazarev/mongoid,Codas/mongoid,fredjean/mongoid,xentek/mongoid,hbakhtiyor/mongoid,Azzurrio/mongoid,greggroth/mongoid,mongoid/mongoid,matsimitsu/mongoid,zBMNForks/mongoid,rafaelgaspar/mongoid,etomic/mongoid,blackxored/mongoid,mgartner/mongoid,voldy/mongoid,janroesner/mongoid,johnny-miyake/mongoid,amw/mongoid,hashrocketeer/mongoid,subhashb/mongoid,kcdragon/mongoid,zenjoy/mongoid,infiverve/mongoid,kcdragon/mongoid,cao7113/mongoid,imomoisoft/mongoid,abezzub/mongoid,captain-lucas/mongoid,stnguyen/mongoid,arnkorty/mongoid,SumeruSoftware/mongoid,elia/mongoid,sivagollapalli/mongoid,timgluz/mongoid,trmmy/mongoid,jonhyman/mongoid,captain-lucas/mongoid,rubrikkfabrikken/mongoid,kuadrosx/mongoid,rpocklin/mongoid,voldy/mongoid,afeld/mongoid,karmakaze/mongoid,mattconnolly/mongoid,X0nic/mongoid,chetan/mongoid,amw/mongoid,demarque/mongoid,karmakaze/mongoid,gregmolnar/mongoid,glebtv/mongoid,CIRCUITLLC/mongoid,shotoso/mongoid,johnnyshields/mongoid,tombruijn/mongoid,jtescher/mongoid,joneslee85/mongoid,jstrocel/mongoid,estolfo/mongoid,wuboy0307/mongoid,kuadrosx/mongoid,evansagge/mongoid,canvas-drw/mongoid,bearded/mongoid,aj0strow/mongoid,mschulkind/mongoid,mikerobe/mongoid,cmpolis/mongoid,zBMNForks/mongoid,wyattisimo/mongoid,Zhomart/mongoid,balauru/mongoid,gicappa/mongoid,ganlron/mongoid,balauru/mongoid,jasl/mongoid,Sharevari-Inc/mongoid,anuprit/mongoid,drfeelngood/mongoid,irakli-janiashvili/mongoid,dbkbali/mongoid,ErisExchange/mongoid,rubrikkfabrikken/mongoid,lucasas/mongoid,bencrouse/mongoid,akirasosa/mongoid,jbrien/mongoid,500px/mongoid,uniiverse/mongoid,stnguyen/mongoid,drfeelngood/mongoid,joshsoftware/mongoid,bearded/mongoid,brynary/mongoid,evendis/mongoid,goshakkk/mongoid,jstrocel/mongoid,aileron/mongoid,Welovroi/mongoid,infiverve/mongoid,colinyoung/mongoid,cmpolis/mongoid,jordoh/mongoid,aleksclark/mongoid,stevebartholomew/mongoid,rinmu/mongoid,anuprit/mongoid,ErisExchange/mongoid,simi/mongoid,akm/mongoid,codedogfish/mongoid,rogerz42892/mongoid,Sharevari-Inc/mongoid,nusco/mongoid,elia/mongoid,etomic/mongoid,aleksclark/mongoid,parov/mongoid,herimedia/mongoid,joshleitzel/mongoid,500px/mongoid,rafaelgaspar/mongoid,joelcogen/mongoid,drobune/mongoid,lucasas/mongoid,nullstyle/mongoid,SumeruSoftware/mongoid,itbakery/mongoid,bjori/mongoid,KoanHealth/mongoid,crowdtap/mongoid,praecipula/mongoid,codedogfish/mongoid,kayakyakr/mongoid,jeyb/mongoid,uniiverse/mongoid,kay-kim/mongoid,matbox/mongoid,hxx/mongoid,goshakkk/mongoid,nviennot/mongoid,mongoid/mongoid,jasl/mongoid,sivagollapalli/mongoid,flada-auxv/mongoid,brynary/mongoid,asaaki/mongoid,subhashb/mongoid,77Agency/mongoid,luxerama/mongoid,jeyb/mongoid,wuboy0307/mongoid,uranazo/mongoid,irakli-janiashvili/mongoid,blackxored/mongoid,cpuguy83/mongoid,Speakol/mongoid,timgluz/mongoid,afeld/mongoid,gicappa/mongoid,PerfectMemory/mongoid,zanker/mongoid,evansagge/mongoid,nviennot/mongoid,rogerz42892/mongoid,nusco/mongoid,joshleitzel/mongoid,joshsoftware/mongoid,tagliala/mongoid,Azzurrio/mongoid,CIRCUITLLC/mongoid,evendis/mongoid,apptentive-engineering/mongoid,matbox/mongoid,krasnoukhov/mongoid,eljojo/mongoid,akirasosa/mongoid,lackac/mongoid,moretea/mongoid,janroesner/mongoid,neerfri/mongoid,crowdtap/mongoid,kay-kim/mongoid,rosylilly/mongoid,dustinwatson/mongoid,eljojo/mongoid,kostyantyn/mongoid,joelcogen/mongoid,Numerico/mongoid,mgartner/mongoid,tricknotes/mongoid,bencrouse/mongoid,praecipula/mongoid,bjori/mongoid,jbrien/mongoid,kslazarev/mongoid,uranazo/mongoid,Subskii/mongoid,johnny-miyake/mongoid,wyattisimo/mongoid,xentek/mongoid,mongodb/mongoid,Welovroi/mongoid,flada-auxv/mongoid,robwil/mongoid,demarque/mongoid,gullitmiranda/mongoid,grossws/mongoid,cpuguy83/mongoid,niedhui/mongoid,canvas-drw/mongoid,gregmolnar/mongoid,herimedia/mongoid,lackac/mongoid,imomoisoft/mongoid,zaithottakath/mongoid,stevebartholomew/mongoid,X0nic/mongoid,neerfri/mongoid,narutosanjiv/mongoid,mattconnolly/mongoid,akm/mongoid,aileron/mongoid,mongodb/mongoid,kentaroi/mongoid,manikandan-kandasamy/mongoid,tricknotes/mongoid,Codas/mongoid,simi/mongoid,alexandru-calinoiu/mongoid,mongodb/mongoid,rpocklin/mongoid,chetan/mongoid,kostyantyn/mongoid,grossws/mongoid,zenjoy/mongoid,cao7113/mongoid,alexandru-calinoiu/mongoid,Numerico/mongoid