moves Lib/Thread to Lib/Saito
move Posting up in architecture
Merge branch 'feature/posting-model' into release/4.6.0
removes Ecach facilities
tweaks item cache
Merge branch 'develop' into release/4.6.0
fixes broken preview
updates to cakephp 2.6-RC
updates bbcode doc
completely remove CacheTree
major code refactoring

introduces DIC, removes Entry::_addAdditionalFields, consolidates Saito namespace
fixes invalid HTML
fixes email address in posting is not shown #296
fixes admin user blocking page is empty if no user is blocked #292
adds admin-plugin hook
show every existing *.log file in admin-area
fixes refresh time field in user profile is too small #291
admin can't safe user profile because of "similar name"-error without changing the username #297
after merging a pinned thread the former root posting is still pinned #294
fixes testcase