CP-1068 Fixes #104: Module interpreted as global module format

[alexcastillo]

Fixes #104

Error: Module interpreted as global module format, but called System register
Solution: Add support to custom meta in karma-jspm config.

Thanks @larrifax for the help.

[maxwellpeterson-wf]

+1 @trentgrover-wf

[trentgrover-wf]

+1
@jayudey-wf ready for merge

[alexcastillo]

Thanks for the +1 @maxwellpeterson-wf @trentgrover-wf

[jayudey-wf]

QA Resource Approval: +10

• Testing instruction (provided by Max Peterson)
• Dev +1's
• Dev/QA +10 with detail of what was tested
  • installed into project that consumes karma-jspm and commands were still working as expected
• Unit test created/updated
• All unit tests pass

Merging into master.

[alexcastillo]

Thanks everyone!