Merge to work on top of test framework changes
added documentation to manual tests
CB-6466 created mobile-spec test

Added a test to check that filetransfer.download() automatically creates
any nonexistent directories.

Also removed some unused code
Merge renamed tests dir
Merge branch 'CB-6466' of https://github.com/stacic/cordova-plugin-file-transfer
CB-6466 Fix failing test due to recent url change
rebase from master
added documentation for new test