Improve perf

[felixSchl]

Improve overall perf by applying optimizations, such as using monomorphic functions, avoiding to call curried functions that are hot and the largest change: remove purescript-parsing and using homebrewn parser library - this should also make the output smaller and hence faster to requrire neodoc.

There's now tooling for measuring the execution time of a single function: scripts/prof.

Current goals:

• Remove purescript-parsing - _note: it's still in the project for the test suite parser, but gets culled during DCE when building for distribution

[felixSchl]

This round of optimizations is concluded with the 1.2.0 release. Further optimizations should be tracked in specific issues.