Add idt.js script and related npm run scripts

[gibfahn]

Opening for review, will need to add tests before this can be landed.

[coveralls]

Coverage increased (+0.2%) to 80.0% when pulling 25b892c on gibfahn:idt-js into fcaa601 on ibm-developer:development.

[coveralls]

Coverage increased (+0.2%) to 80.0% when pulling 2015300 on gibfahn:idt-js into fcaa601 on ibm-developer:development.

[coveralls]

Coverage increased (+0.2%) to 80.645% when pulling 35aed98 on gibfahn:idt-js into e16dbac on ibm-developer:development.

[coveralls]

Coverage decreased (-0.5%) to 80.0% when pulling c8c325a on gibfahn:idt-js into e16dbac on ibm-developer:development.

[coveralls]

Coverage decreased (-0.5%) to 80.0% when pulling c8c325a on gibfahn:idt-js into e16dbac on ibm-developer:development.

[cvignola]

Coverage decreased 0.5%. But is still 80%. So we'll use that as the new base line for now and seek to improve it with the next round of improvements.