Added Setup.py and MANIFEST so ledger can be installed as a requirements app

[xzzy]

Modularised so statdev ledger code is upto date and in sync

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This change is 

[coveralls]

Pull Request Test Coverage Report for Build 797

• 7 of 32 (21.88%) changed or added relevant lines in 7 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 28.428%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
mooring/api.py	1	2	50.0%
mooring/utils.py	0	2	0.0%
setup.py	0	2	0.0%
mooring/models.py	0	3	0.0%
mooring/emails.py	3	20	15.0%

Files with Coverage Reduction	New Missed Lines	%
mooring/emails.py	1	11.73%

Totals
Change from base Build 788:	0.003%
Covered Lines:	17147
Relevant Lines:	60318

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💛 - Coveralls