strange bug occurs in emacs 24.3, not in 24.2, WTFWTFWTFWTFWTF...
add format-spec support in org-page

By default, format-spec is not enabled in emacs, you need to require it
if you want to use it.
refactoring some duplicate related to git

Add a new function which wraps shell command and returns the output as a
string. Mainly used for git related command.
Merge pull request #36 from xiaohanyu/devel

add format-spec support in org-page
make op/do-publication interative.

Convert function op/do-publication to an interactive command, then you
can M-x it.
Merge branch 'devel' of github.com:kelvinh/org-page into office
[#43] consolidate the URI of index and about
Merge pull request #37 from xiaohanyu/devel

make op/do-publication interative.
refine the interactive process
use DFS than BFS of git search