Added Postgres tables for coverage model.
Adding table definitions for coverage_model.
Changed package/path for coverage data store
Added indexes for coverage_spans table.
Fills in the ParameterFunction resource and updates CRD methods
Adds comments to all the fields in ParameterContext
Adds egg_uri field to parameter functions
Adds create_parameter to dataset management

In lieu of replacing the create_parameter_context, I opted to make one that caters to what we need.
In good practice we would refactor our usage to use this, but this is a patch-job to meet expectations.
Switched from geography column to geometry column to increase precision.
Merge branch 'master' of https://github.com/ooici/ion-definitions into HDFtoDB
OOIION-1784: Support for efficient facility list
Merge pull request #508 from ooici/preload-refactor

CIDEVSTC-49 - Refactors Parameter-based DM service methods to respect IonObjects
Merge pull request #509 from mmeisinger/add1784_faclist

OOIION-1784: Support for efficient facility list
Add r3 alpha launch yml
Merge pull request #512 from jamie-cyber1/add_r3alpha

Add r3 alpha launch yml
Removed interface description for get_data_product_provenance_report
Merge pull request #515 from rajvikram/OOIION-M087-T053-A007_rebase

Removed interface description for get_data_product_provenance_report
Merge branch 'HDFtoDB' of git://github.com/caseybryant/ion-definitions into HDFtoDB
Fix typo
Merge pull request #516 from caseybryant/HDFtoDB

M114: Add Postgres table definitions for coverage-model