Run automated tab to space indentation fixer.
Fix @dpshelio's comments on doc indentation.
Merge pull request #1066 from Cadair/tabs

[BigFix]: Run automated tab to space indentation fixer.
Merge branch 'master' of https://github.com/sunpy/sunpy into coordinates-framework
Worked on setting HelioGraphicStonyhurst right.
1. HGS was having problems with 'rad' being inserted as a kwarg where it shouldn't be. Fixed this condition.
2. It was decided, after some deliberation, to let BaseCoordinateFrame handle 'dateobs', which is a TimeFrameAttribute. The rationale behind this is that BCF, if it detects the presence of the 'dateobs' kwarg, pops it off and inserts its value on its own. Thus, we simply add it to kwargs forcefully in our constructor if it isn't there.
3. Only tests remain to be fixed.