Re-enable doctests

[wtgee]

• Disabling TheSkyX tests for now as Mocket is interferring with the config server. Need to replace Mocket anyway. Future PR.
• Fixing doctest options including whitespace issues.

Closes #199

[codecov[bot]]

Codecov Report

Merging #201 into develop will decrease coverage by 3.42%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #201      +/-   ##
===========================================
- Coverage    81.14%   77.72%   -3.43%     
===========================================
  Files           43       48       +5     
  Lines         2631     3107     +476     
  Branches       236      291      +55     
===========================================
+ Hits          2135     2415     +280     
- Misses         433      617     +184     
- Partials        63       75      +12     

Impacted Files	Coverage Δ
src/panoptes/utils/data/metadata.py	75.00% <ø> (ø)
src/panoptes/utils/images/fits.py	81.02% <ø> (+20.51%)	:arrow_up:
conftest.py	85.56% <100.00%> (ø)
tests/test_theskyx_utils.py	92.85% <100.00%> (+0.17%)	:arrow_up:
src/panoptes/utils/images/cr2.py	100.00% <0.00%> (ø)
src/panoptes/utils/stars.py	40.14% <0.00%> (ø)
...utils/serial_handlers/protocol_arduinosimulator.py	18.80% <0.00%> (ø)
src/panoptes/utils/data/__init__.py	100.00% <0.00%> (ø)
src/panoptes/utils/rs232.py	86.60% <0.00%> (+0.89%)	:arrow_up:
... and 5 more

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