Merge pull request #37 from dualface/develop

Release 0.5.1

Merge branch 'master' of github.com:dualface/quickserver

Update README.md

[0.4.0-rc0 release] update README_CN.md

[modify] return the message records only within 2 min.

	modify:         ChatAction.lua

[modify] don't need to init self.redis & self.mysql anymore.

	modified:   StoreAction.lua

[delete] clean server/user_codes dir.

	deleted:    server/user_codes/test.txt

[Release 0.3.6]: update README_CN.md

[format] adjust format of nginx.conf

	modified:   nginx.conf

[modify] support case-insensitive prefix of URI

	modified:   HttpServerBase.lua