Move to google test

All passing.
Move to Bio++ 2.1

It's in trusty.
Test for C++11 compatibilty
Update Boost

missing tr1
Use git://
use git:// for submodules
Move tests
Find Bio++
Google test prefers to avoid underscores
Merge branch 'master' into 71-lcfit

CMake updates, googletest, Bio++ 2.1

Conflicts:
	.gitmodules
Remove CompositeTreeLikelihood.calculator()

Follows up 818d4f99ba48a5d58ddcf47278c077025b939301
Link to lcfit-static