Added a beloglazov theme, which is based on the default robbyrussel theme. This theme adds time, the number of non-pushed git commits, and whether the previous command has failed.
beloglazov theme: removed the "git:" prefix from the branch name to make the prompt shorter
beloglazov theme: call _git_branch_name only once - performance
Changed the indentation style to 2 spaces as requested by @bpinto
Merge pull request #141 from beloglazov/master