Rio-cogeo

* add `--web-optimized` option to create a web optimized COG (10)
* add `--latitude-adjustment/--global-maxzoom` option to adjust MAX_ZOOM for global datasets
* Web-optimized tests needs python3.6 (cogdumper)
* add `--resampling` option to select the resampling algorithm when using `--web-optimized`
* add `--in-memory/--no-in-memory` options to use temporyNamedd file instead of in-memory temp file.

**Breaking Changes:**

* remove deprecated YCBCR profile
* 512x512 dataset without internal tiling are valid

**Breaking Changes:**

* Switch from JPEG to DEFLATE as default profile in CLI (66)

**Breaking Changes:**

* refactor utils.get_maximum_overview_level to get rasterio dataset
as input and reduce the number of dataset opennings (61)

* add more logging and `--quiet` option (46)
* add `--overview-blocksize` to set overview's internal tile size (60)

**Bug fixes:**

* copy tags and description from input to output (19)
* copy input mask band to output mask

**Breaking Changes:**

* rio cogeo now has subcommands: 'create' and 'validate' (6).
* internal mask creation is now optional (--add-mask).
* internal nodata or alpha channel can be forwarded to the output dataset.
* removed default overview blocksize to be equal to the raw data blocksize (60)

* Initial release. Requires Rasterio >= 1.0b1.