stat - function result cache
Set the correct json content-type

Chance text/json to application/json to comply with the RFC.

See http://www.ietf.org/rfc/rfc4627.txt for more information.
Fix style for pointer
80 characters limit + remove tabs
Remove file_stat_t st_cgi;
Merge pull request #406 from Cykey/master

Set the correct json content-type
Merge pull request #403 from pavel-pimenov/fix-cache-call-stat

stat - function result cache
release notes for 5.4
Merge branch 'master' of ssh://github.com/valenok/mongoose
better explanation for websocket2.c example