Runtime, HTML4: moxiecode/moxie@ef2e396e2aba6fae4e36fd490185699723bf2a28.
Runtime: Add static capTest() method.

Evaluates the expression to boolean value and create a function that
always returns it. Handy shortcut for executing complex capability
checks, like in HTML4/HTML5 runtimes.
Runtime, HTML4/HTML5: Revise capability checks.
Tests, Runtime: Add tests for capability check funcs and techniques.
JavaScript: Update binaries.

[ci skip]