Add wait function that utilizes sim clock

[rzblue]

• User level function needs a better name (or should it just replace the Wait/delay functions entirely?)
• C++ tests need to be written
• Need to rewrite the java test- theres still a race condition, and the test is kinda sketchy. (ignore the test for now)

[rzblue]

I think this is a good feature to have, but could be a footgun in unit testing- if this is called while timing is disabled in a single thread it will deadlock that thread.

Need to figure out naming as well.