update symfony and codesniffer
remove rql parser

This was not implemented amd unused. It should probably become its own
bundle since I excpect this to be of much use of other projects if done properly.
more ENTB style fixes (lots of docs)
remove mapper and pager

these might get reimplemented in some way after i write tests for them
remove generator code

We can readd this as soon as a couple of proof of concept entities have been
implemented and streamllined. Now is way to early since our models will
most likely be in flux over the next coupple of iterations.
update remaining docs

This should now pass all 3 levels of phpcs (PSR1, PSR2 and ENTB).