Fix killing in Windows

Before this, gin said, "cannot create gin-bin.exe: Permission denied," because Go does not support Interrupt signal in Windows.
Merge pull request #31 from azyobuzin/fix/windows

Fix killing in Windows
Previously the --path option was being ignored (hardcoded to '.'). This has been fixed
Fix breaking changes from cli flags
Merge pull request #36 from yoink00/fix/path-parameter

The '--path' option is no longer ignored.
JMS #17: If the app exits, restart it next request
Merge pull request #17 from codegangsta/JMS-17

Sporadic error:  http: proxy error: dial tcp 127.0.0.1:3001: connection refused
Add ability to ignore directories.