some more unit tests on xml info parser

This checks that imagecreatetruecolor actually creates an image, rather than returning FALSE.
Without this check, subsequent loop might create billions of ERROR-level log messages.
Signed-off-by: Byron Marohn <combustible@live.com>

Since automatic schema migrations are not yet possible let's disable this for now.

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

So the class files only have class code and don't execute code

Local change 283c10f0

Local changes from d069ee8a
and 258ad38f

Local changes copied from ed835973
and 25370fcb

Only fixed in Local by eeee9eac

Missed in 788c8540

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)`.