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
Add notes that SQLite is CE only
Markup corrections
Depcrate namespaced functions, since they can not be autoloaded
Add functions to modify cookies to response class

Currently there is no AppFramework way to modify cookies, which makes it unusable for quite some use-cases or results in untestable code.

This PR adds some basic functionalities to add and invalidate cookies.

Usage:
```php
$response = new TemplateResponse(...);
$response->addCookie('foo', 'bar');
$response->invalidateCookie('foo');
$response->addCookie('bar', 'foo', new \DateTime('2015-01-01 00:00'));
```

Existing cookies can be accessed with the AppFramework using `$this->request->getCookie($name)`.
Use server container
Remove redundant code
Pass \OC::$WEBROOT to the ctr
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 share interfaces to own files so they can be autoloaded
Move iHomeStorage to own file
Move NaturalSort_DefaultCollator to its own file
Move registration of core preview providers to preview

So the class files only have class code and don't execute code
Limit blacklist to php files

During performance optimization I have discovered that the installer scans all files for the blacklisted words. This greatly impacts speed on lower end devices such as the raspberry pie. This commit limits it to PHP files which seems to achieve the desired effect. 

I have used the --include option to achieve this, see http://stackoverflow.com/questions/1987926/how-do-i-grep-recursively

This contribution is MIT licensed
[tx-robot] updated from transifex
Fix intendation and doc blocks of preview providers