0.4.5: additional type support, SeriesSchema index support, built-in check Aliases, bugfixes

Enhancements

• improve failure case reporting more intuitive #232
• rename internal decorator for setting check statistics #235 thanks @Aditya1001001
• from_yaml supports all column properties #240 thanks @d33bs
• support for nullable integer string aliases and dtypes #244
• add check_output to the CheckResult namedtuple #251
• built-in python scalar types are supported: int, float, str, bool #263
• Use Check.name in Check.repr #265 thanks @JacobHayes
• add comparison operator aliases to built-in checks #269
• add support for SeriesSchema index specification #270

Bugfixes

• io serialization can handle Index.name = None #248
• pandas_dtype can be correctly set in Column object #256
• fix check_input decorator when df passed in kwargs #257 thanks @vshulyak

Documentation Improvements

• Fixed broken link to pandas dtypes #264 thanks @ericmjl