Merge branch 'master' into develop
Comments + readme
Convert bedgraph to coverage for exons
More documentation
SQL naming convetion change

Singlar table names
Captilized table names
Tests for new structure of BamAdaptor
CovAdap and Chanjo passing new tests
docs for Element Adaptor
Rename, SQLAlchemy, utils

 adaptor => adapter
Docs, new-method
Began SQLAlchemy importer, Rename Analyzer:Core
Renamed methods

To separate methods from attributes, more opinionated, less descriptive
of output
Computed properties cov, compl for tx
New importer working!
toDict methods, corrected coords, added api-server
crossdomain for api server
clean up
CovAdapter read returns read depth for all positions in input
np.Array and slice implemented + sphinx
bam + tests: 0,0-based