Merge pull request #23 from hogbait/parser_tests

implemented tests for the parser header
Removed debug print statements.
Repeated bars now handled in conversion. Not yet tested, but the previous, unrepeated tests still work.
Removed repeat information from expanded bars. Would have led to problems.
whitespace fix.
Simple repeat test added.
operands of subtraction were switched.
Merge pull request #24 from hogbait/RepeatBars

Repeat bars
Merge pull request #25 from hogbait/parser_tests

Parser tests
changed the spec for the Bar class
Merge pull request #26 from hogbait/bar_spec_change

changed the spec for the Bar class
implemented parser tests for lyrics