Improve code view

Now it's more similar to GitHub
Improve diff view
Upgrade scalatra-forms to 0.0.14
Add SystemSettings to Context properties
Use Context#settings instead of loadSystemSettings()
trim LF of version file
Small fix
Focus error field after validation.
Display the first line of commit message on the file list
Fix #314
(refs #313)Add files which have FileMode.EXECUTABLE_FILE mode into zip file
(refs #313)Search files which have FileMode.EXECUTABLE_FILE mode not only REGULAR_FILE
Fix TODO
Fix #247 servlet.CommitLogHook.onPostReceive takes minutes

When pushing tags, command.getOldId value is
“0000000000000000000000000000000000000000”.
So, can not get commit logs.
sbt 0.13
Merge pull request #321 from xuwei-k/sbt0.13

sbt 0.13
Merge pull request #319 from jmu/master

Trim LF of version file
Update README.md

Ran into this issue today.  Added to documentation to let other users know about it.
Merge pull request #323 from r0n22/patch-1

Documentation Change for Large file Sizes
Fix #325