0.5.1 - add '--sanitize_names' flag

• 0.5.1 (2019-06-17)
  • Add --sanitize_names to convert invalid characters in column names and
    to shorten them if too long. (See #33; thanks @jonwarghed).

0.5 - remove fields with unsolvable errors

• 0.5 (2019-06-06)
  • Add input and output parameters to run() to allow the client code using
    SchemaGenerator to redirect the input and output files. (See #30).
  • Remove fields with incompatible types (or other errors) from the generated
    schema, instead of picking the type of the first encounter. (See #31).
  • Improve internal data validation handling, reserving exceptions for
    programming errors only.

0.4 - Support CSV files

• 0.4 (2019-03-06)
  • Support CSV input files using --input_format flag. Preserve
    the ordering of fields in the schema file for CSV.
  • Implement --infer_mode flag for CSV files so that fields that are
    present in all input records are marked as REQUIRED in the schema
    (Thanks korotkevics@, see #28).

0.3.2 - add flag to force quoted values to be inferred as strings

• 0.3.2 (2019-02-24)
  • Add --quoted_values_are_strings flag to force quoted values (integers,
    floats, booleans) to be interpreted as a STRING. (Thanks de-code@,
    see #22).

0.3.1 - support integers that overflow 64 bits; support 'UTC' suffix

• 0.3.1 (2019-01-18)
  • Infer integers that overflow signed 64-bits to be FLOAT for
    consistency with bq load. (Fixes #18)
  • Support 'UTC' suffix in TIMESTAMP fields, in addition to 'Z'. (Fixes #19)

0.3: support quoted values of BOOLEAN, INTEGER and FLOAT types

• 0.3 (2018-12-17)
  • Tighten TIMESTAMP and DATE validation (thanks jtschichold@).
  • Inspect the internals of STRING values to infer BOOLEAN, INTEGER or FLOAT
    types (thanks jtschichold@).
  • Handle conversion of these string types when mixed with their non-quoted
    equivalents, matching the conversion logic followed by 'bq load'.

0.2.1 - add benchmarks using anonymized data

• 0.2.1 (2018-07-18)
  • Add anonymizer.py script to create anonymized data files for benchmarking.
  • Add benchmark numbers to README.md.
  • Add DEVELOPER.md file to record how to upload to PyPI.
  • Fix some minor warnings from pylint3.

version 0.2.0: support DATE and TIME types

• 0.2.0 (2018-02-10)
  • Add support for DATE and TIME types.
  • Update type conversion rules to be more compatible with bq load.
    • Allow DATE, TIME and TIMESTAMP to gracefully degrade to STRING.
    • Allow type conversions of elements within arrays
      (e.g. array of INTEGER and FLOAT, or array of mixed DATE, TIME, or TIMESTAMP` elements)
    • Better detection of invalid values (e.g. arrays of arrays).

Fix 'generate-schema' to pass along flags

I forgot to tag this when I pushed it out to PyPI. Already on PyPI.

Update README.md regarding installation under Ubuntu and MacOS.

v0.1.5

Increment version to 0.1.5.