Completed first draft of  package and haddock docs
 added Sunburst
remove pathTrails Iso, which is defined in diagrams-lib now
travis: disable email notification
Get working on ghc-7.7.20130908.

I make not guarantees about 7.8.

Changes:
* allow base 4.7
* add two type signatures that ghc couldn't infer
  (http://ghc.haskell.org/trac/ghc/ticket/5678)
* import annularWedge (I don't understand how this worked before)
Merge pull request #20 from joelburget/master

Get working on ghc-7.7.20130908.
Removed redundant dependency
Merge branch 'master' into metafont-combinators

resolve trivial conflict in .cabal file

Conflicts:
	diagrams-contrib.cabal
Add Semigroup, Monoid instances for the particular join used by Metafont
combinators

Wrap the BasicJoin in Maybe to make the instances uniform
Remove 'directions' metafont join

'arriving' and 'leaving' can be combined with <>