Add ACE-specific assert implementation

[tehKaiN]

• replace checkNull() with assert() (aceAssert()?)
• follow static_assert() syntax with 2nd parameter allowing for error message
  • nice to have: treat 2nd parameter as format string and remaining ones as va_args for logWrite()
• should use logWrite() and then hang in infinite loop
• in release builds, asserts should do nothing
  • perhaps add a compile option to make them work in release builds with systemKill() prints to console?

[tehKaiN]

I also think that assert calls could change into GCC assume attribute on release or other non-assert builds

https://gcc.gnu.org/onlinedocs/gcc/Statement-Attributes.html