Add discussion of exceptions to README.md
Use correct order of parameters; fixes #17
Merge metadata updates from upstream r574
Generated Python files for metadata
Merge code changes from upstream r574
Add test to restore 100% coverage
Update Python3 instructions
Prep for 5.5 release
Clarify return type of number_type(); fixes #18
Add Python 3 note to readme
Merge metadata updates from upstream r578
Generated Python files for metadata