Merging repositories

[Aleix Pol]

Dear KDevelopers,
During the BoF we were discussing whether it would make sense to merge
kdev-python and kdev-php like we did with kdev-clang and kdev-qmljs.

Furthermore, we discussed whether it would make sense to merge
kdevplatform into kdevelop because:
- nobody is using the abstraction
- will definitely simplify the steps to take by new contributors

Thoughts?
Aleix