Merge pull request #925 from bkutil/fix/availability_zone_setter

Make sure crowbar_wall is initialized
Merge pull request #926 from vuntz/fix-crash

Fix crash happening from time to time
Merge pull request #929 from vuntz/fix-error

Fix error string when editing one node
Merge pull request #913 from tboerger/feature/fix-gems

Added explicit gems to environment.rb and crowbar.yml to prevent version mismatch
Fixed gem loading and fixed version numbers for bluepill
Merge pull request #936 from tboerger/feature/gem-fix

[roxy] Fixed gem loading and fixed version numbers for bluepill
Downgraded bluepill for iso build and added dummy task
Added some missing commands to devguid documentation
Merge pull request #939 from tboerger/feature/gem-fix

Downgraded bluepill for iso build and added dummy task
Merge pull request #940 from tboerger/release/roxy/master

Added some missing commands to devguid documentation
Restructured and fixed gem versions for iso build again
Merge pull request #938 from bkutil/fix/proposal_validations

Fix/proposal validations
Merge pull request #949 from bkutil/fix/i18n_param_fix

Fix/i18n param fix
Use correct font size for list of nodes for roles
Fix tests for proposal validations
Merge pull request #954 from vuntz/fix-font-size

Use correct font size for list of nodes for roles
Merge pull request #953 from bkutil/fix/test_fix_for_proposal_validations

Fix tests for proposal validations
Added environment check to rake tasks
Removed chef dependency from rails
Added additional css classes to various html elements