SpFeas updates

Updates

The goal of version 0.3.0 is to support SpFeas for Python 2.7, 3.5, and 3.6.
Enhancements
- Updated syntax to support Python 2.x and 3.x versions.
- Added feature testing

Bug fixes
- Fixed Python scalar issue with LBP calculations.
- However, the LBP outputs are still not correct.

Bug fixes
- Now forcing GeoTiffs to BIGTIFF.
- Fixed satellite dictionary lookup error.
Removed --format command-line option
Added --raster-options command-line helper.
Added support for all spectral indices that are available in MpGlue.

Bug fixes
- Changed YAML status writing from concurrent to single thread.
- Fixed a bounds-checking error with the mean feature that occurred on occasion with odd section sizes.
- Swapped joblib for multiprocessing.Pool to process sections in parallel.

New features
- SpFeas 0.2.0 supports parallel tile reading and writing.
- Added n-jobs-sections and n-jobs-chunks parameters for dual parallelism.
- Added support to monitor corrupted input and output bands.
  - Status checking is performed with a master YAML file.
Bug fixes
- Fixed corrupted output blocks (chunks)
File storage
- Features are no longer stored as individual layers.
  - All statistics are stored in one GeoTiff file.
- Features are no longer stored as one image mosaic.
  - Features are stored by tile.
  - A VRT file still links to all GeoTiff tiles, which allows users to view a full mosaic.