Summary:
This:
1. Moves spec-nylas into spec
1. Gets rid of old & irrelevant specs
1. Moves the `vendor` folder (jasmine libs) into the `spec` folder
1. Moves the `exports` folder to `src/global` and updates all references
I pretty extensively made sure the client still works and that all of the
tests pass. The changes should have no effect.
Test Plan: All tests pass!
Reviewers: bengotow, dillon
Differential Revision: https://phab.nylas.com/D2098
