startup script updates.
add ginga_sunpy path to sys path in startup script.
Merge branch 'master' of github.com:Cadair/ginga-sunpy
Merge branch 'master' of https://github.com/sunpy/ginga-sunpy into latest_work
Use ginga.main.global_plugins to add the plugin.
Startup the SunPy plugin earlier and remove random print statement.
Merge branch 'master' of https://github.com/sunpy/ginga-sunpy into latest_work
Added doc strings
Merge branch 'latest_work' of https://github.com/rajul-iitkgp/ginga-sunpy into latest_work

Conflicts:
	ginga_sunpy/SunPy.py
	ginga_sunpy/__init__.py
Fixed conflicts