haskell-trifecta: require hashable 1.2 or later

Version 1.1 doesn't work: <https://github.com/ekmett/trifecta/issues/23>.
haskell-exceptions: update to version 0.5
haskell-intervals: update to version 0.7
haskell-blaze-builder-conduit: there is no code in this module to generate documentation for
Upgrade hashable to version 1.2.x.

This change in the GHC 7.6.3 profile violates Haskell Platform, but it fixes
many builds that would not succeed otherwise (such as Trifecta). Overriding
hashable locally in an expression is out of question: the package is used
virtually everywhere.
haskell-attoparsec-conduit: there is no code in this module to generate documentation for
haskell-network-conduit: there is no code in this module to generate documentation for
haskell-zlib-conduit: there is no code in this module to generate documentation for