Rails3.use?: use String#include? instead of =~

closes #53
update to bundler 1.3.0.pre.5
update changelog
print warning when removing windows generated Gemfile.lock
bump to v47
display the ruby version change to the user
update changelog
temporarily disable deploys due to rubygems.org compromise
update error message to link to status
update copy
update changelog
v48
use bundle install local
add error messaging when can't deploy due to gems not being in the cache
need ruby_version_cache to exist before reading it
update the changelog
v49
Revert "use bundle install local"

This reverts commit e69301b54de1899c981a1e1b37787e4b664c2ed0.
Revert "add error messaging when can't deploy due to gems not being in the cache"

This reverts commit dfd66ded5ee475d47960d2d43696983cde222a17.
update changelog