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Merge pull request #81 from robotpy/extern-c

Fix extern C and add option to remove preprocessing

Merge pull request #80 from robotpy/ref-qualifiers

Add support for parsing ref-qualifiers

Merge pull request #79 from stephen-hansen/decimal_char_enum_fix

Fix enum parsing bug regarding decimal digit characters

Doxygen comments were being discarded when an attribute was encountered

Merge pull request #78 from robotpy/more-madness

More madness

Merge pull request #74 from robotpy/constexpr-fn

support constexpr functions

Merge pull request #71 from davidcaron/add-access-property-to-using

Add access property to 'using' CppVariable

Merge pull request #67 from Erignik/fix_function_point

Add function pointer parse.