fix to doc
merged from upstream
fixed bug introduced into map draw_grid because of updates to wcs
fixed bug in draw_limb
removed extra code in draw_limb
Fix lightcurve create.
Merge pull request #469 from segfaulthunter/lightcurve

Fix lightcurve create.
Merge pull request #467 from ehsteve/map

Fixed wcs bug after wcs update and new issue with limb and grid
Travis tweak
Merge branch 'staging' of github.com:sunpy/sunpy into staging