GHC 7.10 build failure

```
Control/IMonad/Core.hs:75:14:
Couldn't match type ‘a i0 -> m b i0’
with ‘forall i1. a i1 -> m b i1’
Expected type: (a i0 -> m b i0) -> m a i -> m b i
Actual type: a :-> m b -> m a i -> m b i
Relevant bindings include
(?>=) :: m a i -> a :-> m b -> m b i
(bound at Control/IMonad/Core.hs:75:1)
In the first argument of ‘flip’, namely ‘bindI’
In the expression: flip bindI
```

I revised this on hackage to disallow 7.10: http://hackage.haskell.org/package/index-core/revisions/

It seems this package no longer has any reverse dependencies so supporting GHC 7.10 may not be necessary.