Ollvm/Ollvm_gateway splitted into 2 librairies.
Fixed building system.
Fixed parameters attibute list.
Had to be a list of empty lists of the same size than parameters.
Added files generated with autoreconf and removed autoreconf call in opam file.
Implemented switch instruction in llvmgateway.
Fixed some trivial `assert false`. Added test for {extract,insert}value
instructions: bindings do not implement these instruction with a list of
indices of length not equal to one.
Merge pull request #2 from sagotch/master

Mainly packaging.