Bumped aeson version, fixed typo.
Bump version to 0.7.2
Remove signature for doHttps, bump to 0.7.3

Fixes #51
Merge remote-tracking branch 'schell/aeson-update-plus'

Conflicts:
	Github/Data.hs
Bump version to 0.7.4
Change to allow null value in "milestoneDescription".
Merge pull request #53 from yunomu/nullable-milestone-description

Change to allow null value in "milestoneDescription".
fix error Module Data.Conduit does not export ResourceT
Merge pull request #56 from rom1504/master

fix error Module Data.Conduit does not export ResourceT
Optional pull_request field

Github doesn't seem to send this field (anymore?), so requiring it
breaks things.  Making it optional (with a Maybe in Issue) fixes all of
my code, others may need to tweak things to deal with the Maybe.
Merge pull request #57 from dlthomas/master

Optional pull_request field