fixing build.sh
upgraded everything to aeson >= 0.7, which required fairly major changes
add note about python-dev being necessary on Linux
Merge branch 'master' of https://github.com/gibiansky/IHaskell into display_sideeffects

Conflicts:
	build.sh
	ihaskell-display/ihaskell-aeson/ihaskell-aeson.cabal
	ihaskell.cabal
	ipython-kernel/ipython-kernel.cabal
	ipython-kernel/src/IPython/Message/Parser.hs
	ipython-kernel/src/IPython/Message/Writer.hs
	ipython-kernel/src/IPython/Types.hs
	src/Main.hs