- Cleaned out the vendor directory and moved some

 small external packages into the internal package.

- Added the following build flags:
  - `noS3Cache` - turn off the AWS S3 cache back end
  - `noRedisCache` - turn off the Redis cache back end
  - `noPostgisProvider` - turn off the PostGIS data provider
  - `noGpkgProvider` - turn off the GeoPackage data provider
  - `noViewer` - turn off the built in viewer

Merge pull request go-spatial#368 from go-spatial/v0.6.2

V0.6.2

A minor release for the upcoming demo.

GOOS GOARCH was not being exported to

labeled cgo version instead of nocgo. go-spatial#330

cache seeding with support for s3 and filesystem caches

Performance affected by unused log statements

- Fixed: regression in providers/postgis. EXECUTE_SQL environment deb…

…ug was dropped.

- Fixed: Filecache: concurrent map read and map write on Set() (go-spatial#188)
- Fixed: Filecache: invalid fileKey on cache init (Windows) (go-spatial#178)
- Fixed: Clean up context canceled log (go-spatial#170)

fixed WGS84 translation bug

clipping and make valid. go-spatial#56