add geospatial_point_center calc on create and update ops for DataProducts, PlatformSites and InstrumentSites
merge
Adds coverage tests to test_types
More coverage tests
type tests
Updates coverage
merge branch 'master' of github.com:ooici/coi-services into geopoint

Conflicts:
	extern/pyon
add geopoint calc to observatory and subsite
Cov fixes
Merge pull request #736 from MauriceManning/geopoint

Add geospatial_point_center calc to DataProduct, PlatformSite and InstrumentSite
Merge pull request #740 from lukecampbell/type_tests

Type tests
Adds new field to parameter context: precision
Updates TESTED_DOC, smoke passes
Fixes XN bug
Merge pull request #742 from lukecampbell/fix_pubsub

Fixes XN bug
Merge pull request #741 from lukecampbell/precision

Adds new field to parameter context: precision
Bumped pyon
Bumped ion-defs
Merge pull request #743 from shenrie/master

Bumped pyon
fixed return value for policy function