added more tests
Added tests for sun library
Added tests for sun library
added Nobeyama Radioheliograph as a lightcurve source
more edits to new NoRH Lightcurve class
bug fix for norh source.
implementing support for NoRH tcx data.
bug fixes for NoRH lightcurves
added a peek() function to NoRH lightcurves.
Implemented derdon's request for NotImplementedError.
Used a frozenset to store VSO attributes currently supported.
Fixed indentation; some weird issue with gedit
Fixed indentation again; used vim instead
Made changes according to derdon's suggestions.

1. Changed name of frozenset to SUPPORTED_SIMPLE_VSO_ATTRS.
2. Put the raise block in proper position.
3. Changed the error message.
4. Removed test.sqlite.
Changed frozenset values to lowercase; made 'if' block check for typ.lower().
Added 'starred' to the frozenset in a bid to please Travis
Added derdon's changes.

1. Removed 'starred' from frozenset.
2. Added check for typ.lower() for 'starred'.
Fix for NotImplementedError being unnecessarily raised.

1. Put 'starred' in frozenset SUPPORTED_NONVSO_ATTRS.
2. In the typ.lower() check, used a unionized set from the vso and nonvso attrs.
more fixes for norh lightcurve support.
added user and password that is accepted by NoRH FTP site to base url. Tweaks to peek function.
more tweaks to peek function