Move available librarys to composer

This leaves only two libraries that were managed by pear in the `lib` directory:
* doctrine: It looks like mediahub is using version 1.2.4, and there is no composer support for that version.
* unl_services_peoplefinder: I could not find the repository for this library, so I could not convert it to use composer.

#142 
Trailing `y`?