Added loading changes to the changelog.
Merge pull request #228 from udp3f/master

edit comp_hets doc
[BUG] allow individual sample info from gt_* columns to be JSON serializable.
Added --carrier-summary-by-phenotype.

This gives carrier/noncarrier counts for all values of given phenotype column
in the phenotype table. So for example:

--carrier-summary-by-phenotype affected will add onto the end of a query
five columns affected_carrier, unaffected carrier, affected_noncarrier,
etc. with an 'unknown' column of all the samples where either the
phenotype or the genotype are unknown.

This will work with any column in the sample table, so for example to
get carrier/noncarrier counts by hair color, just do hair_color instead
of phenotype.

Some collaborators were asking for this kind of summary for prioritizing
variants.
Merge branch 'master' of github.com:arq5x/gemini
Removed unused stub.
Added --nonsynonymous option to the C-alpha test.
Update Miniconda installer to latest version.
Added gemini amend to edit an existing database.
Fixed error with JSON formatting.

Also moved the format selection to this module, as it makes
more sense here.
Added a database_transaction context.

This will open a database, return a cursor to it, commit and
close the connection when the with statement has ended.
Moved PED file parsing to the ped module.
Added gemini amend.
Moved format selection to the GeminiQuery module.
Bug fixes for JSON output, the unit test for amend
and test-genotypes.

test-genotypes now returns more than two decimal places.
Bug fix for missing attributes.
Utility function to quote a string.
Fix new unit tests.
Merge branch 'master' of github.com:arq5x/gemini
Added gemini amend to the documentation.