Bump version number following new policy

We now keep the HEAD version numbers as values which would be suitable
for immediate release.

integer-simple.cabal

 name:           integer-simple
-version:        0.1.0.1
+version:        0.1.1.0
 -- GHC 7.6.1 released with 0.1.0.1
 license:        BSD3
 license-file:   LICENSE