Prefix public macro names with ERFA_, upper case them also
Make the RE to find macros more robust
change macro-replacement to not remove erfam.h
added some clarifying comments
Merge pull request #1 from eteq/fix-macro-extractor

change macro-replacement to not remove erfam.h
Merge pull request #7 from sergiopasra/macroprefix

Prefix macros with ERFA_ (and upper case them)
added info in README about source_flattener.py