0.6.1.0

Mostly a bugfix release.

New features:

• Add initial windows support (#47, #48, #58): now spago should run fine on Windows. Unfortunately we're not distributing binaries yet, but the only installation method available is from source (with e.g. stack install)

Bugfixes:

• Don't overwrite files when doing init, just skip the copy if some file exists (#56)
• Print git output in case of failure when doing install (#54, #59)
• Include building src/* when running test (#50, #53)
• Make file embedding indipendent of the locale when compiling; now we just use Unicode