Add Caveats section to readme
Add Caveats section to readme

Users that are unfamiliar with the project may find some aspects unintuitive.  We should try and warn them so that they can have a better experience 

These are all ways that users broke VVV while I was helping them at WordCamp Lancaster
ericandrewlewis/VVV,cfoellmann/VVV,saucal/VVV,enriquezm/VVV,TobiasBg/Varying-Vagrant-Vagrants,AngeIII/VVV-Simplified,AngeIII/VVV-Simplified,erikjoling/VVV,peterblazejewicz/vvv-custom,thatmitchcanter/VVV-Lite,tttanaka/VVV,patrickheeney/VVV,ezekg/VVV,jjogle/VVV,n2linux/VVV,ericmann/VVV,Varying-Vagrant-Vagrants/VVV,Varying-Vagrant-Vagrants/VVV,miya0001/VVV,cristovaov/VVV,zaantar/vov,rpkoller/VVV,hellquist/vvv,saucal/VVV,hellquist/vvv,DrewAPicture/varying-vagrant-vagrants,lkwdwrd/varying-vagrant-vagrants,n2linux/VVV,namminammi/VVV,miya0001/VVV,Varying-Vagrant-Vagrants/VVV,tim-steele/VVV,WybrenKoelmans/VVV,writecodedrinkcoffee/VVV,thatmitchcanter/VVV-Lite,WybrenKoelmans/VVV,harvestweb/VVV,EHLOVader/VVV,startsiden/lokalhero-wordpress-vagrant,thatmitchcanter/VVV-Lite,rooftopcms/VVV,iparr/VVV,peterblazejewicz/vvv-custom,tim-steele/VVV,taupecat/VVV,trepmal/varying-vagrant-vagrants,clreed87/VVV,morganestes/VVV,evelynriossf/VVV-MultiMachine,BlakeRxxk/VVV,trepmal/varying-vagrant-vagrants,killa-kyle/vvv,rogeruiz/VVV,EHLOVader/VVV,grantnorwood/VVV,morganestes/VVV,salcode/VVV,tpkemme/TVV,namminammi/VVV,jjogle/VVV,patrickheeney/VVV,tu-software-studio/VVV,ryandury/VVV,iparr/VVV,tttanaka/VVV,tomjn/varying-vagrant-vagrants,clreed87/VVV,tu-software-studio/VVV,Haimanot1989/vvv-at-senitel,mikesprague/VVV,jcgsville/iProcrastinated,taupecat/VVV,Haimanot1989/vvv-at-senitel,AngeIII/VVV-Simplified,digitalmediaproduction/JAMAVagrant,rooftopcms/VVV,taupecat/VVV,tpkemme/TVV,TobiasBg/Varying-Vagrant-Vagrants,zaantar/vov,tpkemme/TVV,taupecat/VVV,cfoellmann/VVV,saucal/VVV,DrewAPicture/varying-vagrant-vagrants,startsiden/lokalhero-wordpress-vagrant,rpkoller/VVV,jcgsville/iProcrastinated,cristovaov/VVV,tu-software-studio/VVV,evelynriossf/VVV-MultiMachine,digitalmediaproduction/JAMAVagrant,ericandrewlewis/VVV,mattbanks/VVV,primozcankar/VVV,designreuse/VVV,jjeaton/VVV,killa-kyle/vvv,harvestweb/VVV,tu-software-studio/VVV,writecodedrinkcoffee/VVV,rogeruiz/VVV,bitclaw/VVV,grantnorwood/VVV,speartail/VVV,AngeIII/VVV-Simplified,mattbanks/VVV,morganestes/VVV,mattbanks/VVV,nexusthemes/VVV,usminteractive/VVV,westi/varying-vagrant-vagrants,ezekg/VVV,tomjn/varying-vagrant-vagrants,usminteractive/VVV,ericmann/VVV,jjeaton/VVV,startsiden/lokalhero-wordpress-vagrant,salcode/VVV,tpkemme/TVV,designreuse/VVV,westi/varying-vagrant-vagrants,bitclaw/VVV,enriquezm/VVV,primozcankar/VVV,lkwdwrd/varying-vagrant-vagrants,startsiden/lokalhero-wordpress-vagrant,mikesprague/VVV,speartail/VVV,AngeIII/VVV-Simplified,erikjoling/VVV,ryandury/VVV,commana/moodle-vagrant,commana/moodle-vagrant,BlakeRxxk/VVV,nexusthemes/VVV