Update INSTALL.md to explain bundler usage, along with other improvements.
Update INSTALL.md to explain bundler usage, along with other improvements.

bencornelis/calagator,reidab/calagator,CorainChicago/ActivateHub,reidab/calagator,matthewkmayer/calagator,reidab/calagator,CorainChicago/ActivateHub,nblackburn87/calagator,reidab/calagator,CorainChicago/ActivateHub,matthewkmayer/calagator,iamBalaji/Calagator,matthewkmayer/calagator,shawnacscott/calagator,iamBalaji/Calagator,VolunteerOdyssey/calagator,bencornelis/calagator,oktober/calagator,oktober/calagator,kerrizor/calagator,cp/calagator-1,eeeeeean/windchimes,Villag/dentonator,kerrizor/calagator,oktober/calagator,dudleysr/calagator-workspace,cp/calagator-1,nblackburn87/calagator,alexbeeken/calagator.org,cp/calagator-1,iamBalaji/Calagator,dudleysr/calagator-workspace,bencornelis/calagator,shawnacscott/calagator,eeeeeean/windchimes,L2-D2/calagator,alexbeeken/calagator.org,shawnacscott/calagator,shawnacscott/calagator,oktober/calagator,Eugator-Wranglers/calagator,VolunteerOdyssey/calagator,iamBalaji/Calagator,nblackburn87/calagator,L2-D2/calagator,jmcduffie32/calagator,cp/calagator-1,jmcduffie32/calagator,jmcduffie32/calagator,Villag/dentonator,kerrizor/calagator,L2-D2/calagator,Villag/dentonator,L2-D2/calagator,bencornelis/calagator,CorainChicago/ActivateHub,VolunteerOdyssey/calagator,Eugator-Wranglers/calagator,matthewkmayer/calagator,jmcduffie32/calagator,kerrizor/calagator