* .gitignore (tsconfig.tsbuildinfo): Ignore generated file (used for
incremental builds).
* Makefile.am (tsout): New variable an recipe.
(modindex, check): Depend on tsout.
* dummy.ts: New (temporary) file. Will be removed once we have at least one
ts file.
* npm-shrinkwrap.json: Update.
* package.json.in (devDependencies)[typescript]: New dependency.
* tsconfig.json: New configuration file.
Copies script from GNU ease.js.
* .gitignore: Do not ignore `build-aux/vergen'.
* build-aux/vergen: Add file from GNU ease.js.
* configure.ac: Use `vergen' to generate version string.
``Building'' Liza will not be required to use it; see ease.js for the style
of building that will be used here. In particular: the build process will be
used for minification and the creation of distribution archives, but one can
simply include the source files (using, say, node.js) to use it without
building.