README: Add Paul to contributors section
README: Fix contributors list to be a list

Markdown is something I use so rarely I forget how it works.
tests: Bump to newer check API that works in 0.9.10
Fix #15 - Replace assert() with an always-on ASSERT()

Implementation is pretty barebones, should be fine for us.
src/util: Move assertion check out of function call
Fix #16 - Drop explicit linker version script in favor of -fvisibility=hidden and tagging