refact imports to github.xxx. update go.mod + go.sum
* removed vendor/ folder
* Added vendor/ submodule.
Moved dependencies that need to be vendored into separate repository.
- https://github.com/spdfg/elektron-vendor
Added vendor/ as a submodule using the below command.
- git submodule add https://github.com/spdfg/elektron-vendor vendor
If wanting to use vendor, run the following commands after cloning
elektron.
1. git submodule init
2. git submodule update
* added instructions to clone vendor/ submodule.
* updated module to spdfg. Refactored imports
