Support for Service and App entity types

[briehl]

includes NMS/Catalog wrapper API (well, just NMS for now).

[coveralls]

Pull Request Test Coverage Report for Build 176

• 64 of 83 (77.11%) changed or added relevant lines in 8 files are covered.
• 12 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-1.4%) to 88.561%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
feeds/external_api/workspace.py	0	2	0.0%
feeds/entity/types/service.py	11	19	57.89%
feeds/entity/types/app.py	11	20	55.0%

Files with Coverage Reduction	New Missed Lines	%
feeds/entity/types/narrative.py	1	95.0%
feeds/entity/types/group.py	1	61.9%
feeds/external_api/groups.py	3	76.0%
feeds/entity/types/job.py	3	47.83%
feeds/external_api/workspace.py	4	61.73%

Totals
Change from base Build 175:	-1.4%
Covered Lines:	1409
Relevant Lines:	1591

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💛 - Coveralls