* add `setFnTest`, `setFnVisible`, `setFnStaticEval`,
`setFnNoInline` builtin functions to replace previous
directive functionality
* add `coldcc` and `nakedcc` as keywords which can be used as part
of a function prototype.
* `setDebugSafety` builtin can be used to set debug safety features
at a per block scope level.
* closes#169
This replaces the current generic syntax for functions and replaces
it with the concept of inline parameters.
This paves the way for the "all structs anonymous" proposal.
Closes#151.
Andrew Kelley