Adding proper support for python2.x version of ConfigParser

[alurban]

This PR adds proper support for ConfigParser, the native python2 configuration parser. It solves a version issue by creating a dictionary of section parameters if a call to configparser[section] fails.

Test output is here (requires LIGO.ORG credentials): https://ldas-jobs.ligo-la.caltech.edu/~aurban/wdq/L1_1172489783.07/

This fixes #100.

[coveralls]

Pull Request Test Coverage Report for Build 250

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 40.0%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
gwdetchar/omega/config.py	0	1	0.0%

Totals
Change from base Build 248:	0.0%
Covered Lines:	428
Relevant Lines:	1070

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💛 - Coveralls