install from source on mac

[lauraadam]

#1:

on mac, when building gro we had to change for the
macx {
LIBS += -L../build-ccl -lccl -L../chipmunk/src -lchip

to
macx {
LIBS += -L../build-ccl -lccl -L../chipmunk/src -lchipmunk

and then #2 to run gro, we had to do from Code/gro:
cp -r include/ ../build-gro-Desktop_Qt_5_4_1_clang_64bit-Debug/