* Add compiler option to enable declaration sourcemaps
* Transparent goto definition for sourcemapped declaration files
* Post-rebase touchups
* Rename API methods
* Fix lints
* Fix typo in name XD
* Log sourcemap decode errors
* Share the cache more, but also invalidate it more
* Remove todo
* Enable mapping on go to implementation as well
* Allow fourslash to test declaration maps mroe easily
* more test
* Handle sourceRoot
* Add tests documenting current behavior with other sourcemapping flags
* Ignore inline options for declaration file maps, simplify dispatch in emitter
* Change program diagnostic
* Fix nit
* Use charCodeAt
* Rename internal methods + veriables
* Avoid filter
* span -> position
* Use character codes
* Dont parse our sourcemap names until we need to start using them
* zero-index parsed positions
* Handle sourceMappingURL comments, including base64 encoded ones
* Unittest b64 decoder, make mroe robust to handle unicode properly
* Fix lint
* declarationMaps -> declarationMap
* Even more feedback
* USE Mroe lenient combined regexp
* only match base64 characters
* Fix nit
