Gpsdio

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User can now sum a field instead of just computing density - 5.
Added a `--version` flag.
Small internal performance boost.

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gpsdio I/O args are now passed to `gpsdio.open()` - 4
CRS info is now properly applied to the output raster - 3

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Initial release - compatible with `gpsdio>=0.0.2`.

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- Expose information about drivers through `gpsdio env --driver-help` - 120
- `gpsdio insp` supports alternate interpreters and uses `src` var instead of `stream` - 109
- i/o drv/cmp options moved from main CLI to subcommands - 108
- Fixed a bug where `gpsdio.open('-', 'a')` would open `stdout` - 105
- Support for already open file pointers - 104
- Drivers must now implement an `open()` method - 99

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- `--indent 4` is now the default for `gpsdio info` but `--indent None` will disable indentation - 93
- Added `--with-field-hist` to `gpsdio info` to get a report message counts by field - 90
- External drivers must now subclass `gpsdio.base.Base/Compression/Driver` - 85
- IO mode is validated when opening a file based on the driver's `io_modes` - 75

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- Added `gpsdio info` CLI command - 86
- Fixed license typo in `setup.py` - 82
- Require `six>=1.8` for metaclass support - 78