CB-4872 - added bb10 ndk version scripts
CB-5139 - fix to able call bb10 version script from anywhere
CB-4780 update script for cli platform update command
CB-4780 update script with windows support
CB-4531 changed error codes in line with spec for helper scripts
[CB-4931] Updated signing process to allow passthrough of args

- Allowed users to specify tool parameters through blackberry10.json
- Fixed signer logic to default to user parameters

Reviewed by Bryan Higgins <bhiggins@blackberry.com>
Tested by Jenny Gee <jgee@blackberry.com>