Start things on env
Merge branch 'develop' into feature-env
Fixed remove-from-env events not propagating when instantiating set variables.
Merge pull request #102 from JLiangWaterloo/fix-env-event-on-inst

Fixed remove-from-env events not propagating when instantiating set vars
Deep refactoring of environment. Step 1
Deep refactoring of environment. Step 2
Delete IStateIntProcedure
Update templates
Merge branch 'develop' into feature-env
Merge branch 'feature-env' into develop
minor fix
newIntVar

for small domains (BitSet+Array)
add new traces for tests + new model (Hakan)
Merge branch 'feature-fixes' into develop
Hakan: as suggested, replace "x_0_0" by "x[0][0]" in the name of variables
Add opposite constraint parameter in implies
Fix bug in GCC (thank you Hakan)
Fix bug in StoredDoubleVector
Switch to CUSTOM propag in Fast GCC
Merge branch 'feature-fixes' into develop