Support for ysear.ch

Uses same template as bc.vc
Example link: http://ysear.ch/cVM
Support for picamatic.com

Example by annlabv3:
http://www.picamatic.com/view/9566581_20100729_designtea/
Support for pic5you.ru

Example of image by annlabv3: http://pic5you.ru/28036/3772528/
Support for piccash.net

Example of image by annlabv3: http://piccash.net/1076/77934/
Support for picp2.com

Example link by annlabv3: http://picp2.com/20491/577878/
Fix request headers in AJAX.
Allow client override AJAX headers.
sh.st

Fix for server-side restriction.

close #455
close #467
Merge remote-tracking branch 'devnoname120/ysear.ch' into develop

close #264
close #457
Merge remote-tracking branch 'devnoname120/picamatic.com' into develop

close #171
close #458
Merge remote-tracking branch 'devnoname120/pic5you.ru' into develop

close #169
close #459
Merge remote-tracking branch 'devnoname120/piccash.net' into develop

close #173
close #460
Merge remote-tracking branch 'devnoname120/picp2.com' into develop

close #177
close #461
picstwist.com

Add new site.

close #181
close #462