Merge pull request #726 from Cadair/documentation_sprint

attempt to fix RTD build
small refactor of the travis yml
fix travis build
fix the sphinx build
Merge pull request #727 from Cadair/documentation_sprint

Fix ALL THE WARNINGS
Merge pull request #733 from Cadair/documentation_sprint

bump numpy requirement in a vain hope of fixing rtd again
bump numpy requirement in a vain hope of fixing rtd again
improve Mac XCode install docs and cross referencing
Merge pull request #734 from Cadair/documentation_sprint

improve Mac XCode install docs and cross referencing
Merge remote-tracking branch 'origin/master' into documentation_sprint

Conflicts:
	sunpy/map/mapbase.py
Merge branch 'documentation_sprint' of github.com:sunpy/sunpy into documentation_sprint

Conflicts:
	sunpy/map/mapbase.py
fix error introduced in adding quantities in draw_limb
fixes the apparent right ascension in sun.py.
remove the incorrect array indexing
Merge pull request #737 from wafels/fix_app_ra

Fixed for the apparent right ascension
Merge pull request #735 from ehsteve/bugfix

Fix error introduced in adding quantities in draw_limb
Merge remote-tracking branch 'origin/master' into documentation_sprint

Conflicts:
	sunpy/map/mapbase.py
Merge pull request #720 from sunpy/documentation_sprint

Results of the Documentation sprint
Merge remote-tracking branch 'upstream/master' into iris