* Remove the bitrotted and useless basic/abc/ test.
* No need for the basic/ subdirectory. Move minimal to the top.
* Update TypeScript to 2.5.3.
* Check in lockfiles to ensure repeatability in Travis tests.
This restructures the examples directory a bit, into three buckets:
* basic/: simplistic examples, like hello world and whatnot.
* conversions/: actual conversions from existing samples (with the source cited).
* scenarios/: more complex examples that demonstrate various features of the system.
