v0.9.0 release

• Fix instructions and target hpc data directory for Cabal 1.22 / GHC 7.10 (#38)
• Print hpc coverage data directory tree when failing to read tix file (#39)
• Improve handling of coveralls response reading/parsing (#41)
• Send "source digest" instead of "source" (#43)
• Add --curl-verbose flag to enable curl verbose mode and replace --print-response (#42)

http://hackage.haskell.org/package/hpc-coveralls-0.9.0