overview: Fix markdown rendering.

Fix it by removing whitespace from source.
routes: support trailing slash in some url
proejct-desc: desc textarea size limit to 255 & desc style change
Merge pull request #259 from insanehong/bug/author

감사합니다.
code: Make Code Browser much faster.

This reduce the time taken to show a root directory which has:

* 6 files and 4 subdirs in a git repository with 1923 commits,
  from 198ms to 55ms. (3.6x faster)
* 124 files in a git repository with 825 commits,
  from 6291ms to 135ms. (46x faster)
Merge pull request #264 from npcode/fix/code-browser-performance

code: Make Code Browser much faster.
log: Leave login id in every entry.