Merge pull request #2 from trofi/master

hsimport.cabal: add missing test files to tarball
Test suites require at least cabal 1.9.2
hsimport.cabal: add README to tarball
Workaround for some haskell-src-exts exceptions, regarding operator heavy code
hsimport.cabal: allow attoparsec-0.11 and text-1.1

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>