You can only change the oritentation of a JPEG

TIFFs also have EXIF headers, but they're not supported by the Image class

PHP doc
http://php.net/manual/en/function.exif-read-data.php
Depcrate namespaced functions, since they can not be autoloaded
Make MappedLocal::isLocal() true like for Local

Missed in 788c8540aa6aac50795c37b088eeaa561d44b86c
Check file existance in MappedLocal in hasUpdated()

Only fixed in Local by eeee9eacea333035e22ef3ed938e36f56bc762cd
Check return of disk_free_space before returning it

Local changes copied from ed8359737199a8a6640986e00df80d971aa6e1d7
and 25370fcb8235d2129cab0f8a5843c4784b3673d0
Check whether file exists before trying to touch() it

Local changes from d069ee8a8bce6a08d8b7921ad378c60af2a0439e
and 258ad38fd3c1e3cdc4ec20238b166e78c334b814
Also clearstatcache() in MappedLocal before using the stats

Local change 283c10f010f5da4ca0b6b7658ac1fa730b8858bf
Move registration of core preview providers to preview

So the class files only have class code and don't execute code
Fix intendation and doc blocks of preview providers
Split office providers into one class per file
Split bitmap providers into one per file
add activity priorities to core so that other apps can reuse it
Skip lostcontroller sending email test on windows
Merge pull request #12489 from owncloud/skip-sendpassword-email-test-windows

Skip lostcontroller sending email test on windows
Merge pull request #12483 from owncloud/issue/6101-preview-providers

Issue/6101 Autoload preview providers
Merge pull request #12486 from owncloud/activity_priorities

add activity priorities to core so that other apps can reuse it
concatenate queries with 'or'
Disable MSSQL for new CE installations

Since automatic schema migrations are not yet possible let's disable this for now.
Disable OCI as it is unsupported by most CE apps
Adjust sample config