All .go source files should be in repository root

[F21]

The .go files should not be nested in a plivo folder in the repository. Instead, all the .go files should be moved directly to the repository root in order for the project to follow go conventions.

Some issues caused by the code being nested in the plivo folder includes:

• Godoc does not work: https://godoc.org/github.com/github.com/plivo/plivo-go/
• Dependency management tools may not be able to import the code correctly.

[plivo-sdks]

Agreed. Missed this entirely. Will restructure it later today.

Edit (11/22/2017): We are working on the documentation updation, and could take a little more time.

[donl]

The documentation code examples located on Plivo's site:

https://developers.plivo.com/server-side-sdks/go-sdk/

stil reference the github.com/plivo/plivo-go/plivo in the code examples.