adding icon for working copy, to be added to a glossary of terms
move file to a git-icon naming convention
move file to a git-icon naming convention with size
Adding Git icons for glossary
updated export bitmap path - was pointed to repository-github as that is the file it was copied from
adding git staging icon for glossary
Git submodules graphics
refactored heroku quickstart guide, added PHP as a supported language in list
simple logo for hack the tower event
adding hexo guides
added Heroku developer workflow guide