Merge from upstream
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Add transMult(), poroMultDeriv() and transMultDeriv().
Merge pull request #251 from atgeirr/rockcomp

Add transMult(), poroMultDeriv() and transMultDeriv() to RockCompressibility.
Merge remote-tracking branch 'upstream/master'
Don't build/run "test_newfluidinterface.cpp" during "make test"

The executable is not written as a unit test (e.g., using Boost.Test)
and furthermore requires external data (in a very specific location).
This makes it inappropriate for use during "make test", but it could
(and should) be cleaned up and incorporated into the test portfolio at
a later time.
Merge pull request #252 from bska/dont-run-non-unit-tests

Dont run non unit tests