Fix build errors on 32-bit systems
Merge pull request #4 from haskell-distributed/32bit

Fix build errors on 32-bit systems
Bump version to 0.2.0.1
Specify minimal working version of libssh2.

It compiles at my machine with 1.2.8.

refs https://github.com/portnov/libssh2-hs/issues/5
Merge branch 'master' of git://github.com/qnikst/libssh2-hs into qnikst_merge