Removed gitattributes file
Restructured gitignore files and removed KEEP_THIS files
Moved javascript into barclamp specific application.js, register barclamp javascripts
has_node? method not called anywhere
Added version 10 contraint to chef gem
Refactored the documentation part
Drop human_attribute_name

Remove human_attribute_name. Role/NodeObjects don't use it,
replace ProposalObject's calls with a direct I18n.t in the proposals
view.
Merge pull request #1037 from bkutil/dead_code

Remove unused code
Merge pull request #1035 from tboerger/feature/cleanup

Cleanup backported from rails4 branch