fix default redmine github url and reference for 2.3-stable
drop branch attribute, update/revise README, add CHANGELOGS
Vagrantfile, add hint for setting chef-solo -l debug
Vagrantfile, add force_deploy attribute with false value
inject gem db dependencies into Gemfile.local, set mysql2 for development as well
bundle install, add --path=vendor/bundle to isolate gems and make them user installable
set environment and user for execute bundler commands in before_migration callback
update migration command for redmine 2.3 to prevent deprecation warning
update README, add note on redmine version
finally raise version and set to 0.0.4