[tests] Starting to test Mysql and Sqlite SPOD on Travis
[php/travis] Try to install PDO-mysql dependency
[neko] MySql tests passing
[php] Fix Bool not being converted correctly
[php] When insert is called on a new instance, and an update is called afterwards, its cache is null. So create the cache if it's not available. PHP unit tests passing for MySql
[php] Report database name with correct capitalization. Starting SQLite tests
[tests] Add database name on error reporting
[php/neko] Handle the types at Manager that cannot be handled correctly at the drivers' side
[spod] Transform DData into Bytes as well, and also set the mapped types' values into the cache again
[travis] Disable SPOD OSX tests
Merge pull request #3291 from waneck/typed_spod

SPOD fixes. Closes #2273 . Closes #2110 . Closes #1880 .