Update conda arguments
Merge pull request #258 from ChrisBeaumont/travis

Need to explicitly set some conda versions, to sidestep incompatible package combinations
Fix histogram log ticking

Closes #250
Suppress unnecessary component updates in histogram
Pad histogram y limits

Closes #200
Update dependency list

Closes #247
Closes #246
fix tests
Merge pull request #257 from ChrisBeaumont/histo-log-tick

Histogram improvements
Merge pull request #256 from ChrisBeaumont/deps

Update dependency list
Fix overplotting entire datasets on images.

Closes #249
Merge pull request #260 from ChrisBeaumont/hist-scatter-fix

Fix overplotting entire datasets on images.
Home button resamples image. Closes #103
Fix file drag+drop
Merge pull request #269 from ChrisBeaumont/data_drop

Fix file drag+drop
Merge pull request #263 from ChrisBeaumont/resample-on-home

Home button resamples image. Closes #103
Refresh parsed component code.

Closes #268
Merge pull request #271 from ChrisBeaumont/parsed_component

Update to Parsed Components
Yield-able state loaders to handle circular imports
Refactor SubsetState to remove parent reference
Refator DataCollection to instantiate the hub everyone is to use