Add test for basic REPL commands
Support uniqueness types when executing IO actions in REPL
Fix typo in help message (language extension)
Use exact name lookup when building from ibc
Add annotations for :search result classification
Add upper bounds to cabal package dependencies.
Remove Cabal library dependency and add more upper bounds
Factor out LLVM backend

The LLVM backend is now available as a seperate project on github.
Adapt travis testing
Only build llvm backend if testing llvm