Remove Interpreter for now
Merge branch 'ifThenElse' into 'master'

If then else

Added support of smart IfThenElse (which includes branch analisys) and ordering operations (currently only LT) in lms-backend. Added correpondent test.
setup cross-building against scala 2.10 and 2.11

scalan aggregates common, meta, core, ce and is cross-building against 2.10 and 2.11
frontend is building only for 2.11
lmsBackend ib building only for 2.10
Fixed compilation error and warnings under 2.11
Merge branch 'cross-compilation' into 'master'

Cross compilation

Fixes #5
Make `core` project a cross-compilation root.

In summary:

* `scalan` - root project for builds against `2.10`
* `core` - root project for cross-building against `2.10` and `2.11`
* `frontend` - builds against `2.11`
Merge branch 'cross-compilation' into 'master-github'

Cross compilation
Improved push-github script
fix implicit compiler config resolution
Merge branch 'improved-scripts' into 'master-github'

Improved scripts
Merge branch 'fix-implicit-config' into 'master-github'

Fix implicit config
Merge remote-tracking branch 'github/master' into master-github

Conflicts:
	core/src/main/scala/scalan/monads/Algebraic.scala
	project/Build.scala