Updating README.md with quickstart info.
Merge branch 'master' of https://github.com/TimAbraldes/j2me.js into updated-readme

Conflicts:
	README.md
Removing spurious backticks
VM stops if RuntimeException is not handled in a thread.

An error is thrown in context.js:
 TypeError: caller is undefined
Merge pull request #501 from PinZhang/pzhang/runtime-exception-in-thread

VM stops if RuntimeException is not handled in a thread.
Addressing review comments and updating formatting
RunTests1 -> RunTests
Merge pull request #511 from TimAbraldes/updated-readme

Update README.md with info on building and testing