quick and dirty installation guide

To install:

git clone https://github.com/mikeizbicki/subhask.git
git clone https://github.com/mikeizbicki/HLearn.git
cd HLearn
cabal sandbox add-source ../subhask
cabal install --only-dependencies
cabal build

If you haven't used hmatrix before, it will need libglpk. On Ubuntu, this is just apt-get install libglpk-dev

llvm-3.5 is needed, 3.4 (as currently provided in Ubuntu LTS - trusty) will give compilation errors (Assembler - Error: can't resolve `.rodata') - see install/ubuntu-precise.sh for installation hints.