no more benchmarks with WPO for now
native NFA compiler works. sometimes slower sometimes faster... hmmm...
format benchmarks
some silly progress
Finally, a working native regexp compiler.

There's some pretty hefty benchmark improvements. Now only 2x slower
than Python on regex-dna. Crushing Go/RE2 on all benchmarks except where
the algorithm is more clever.
Remove junk.
Push native branch.
Add in the 'ignore .*? with ^' optimization.
Start the replacements first.
Get rid of perf data when cleaning.
More perf improvements:

- Turn char class matching into match { } expressions.
- Stop generating hashmaps for every capture group (duh).
Better profiling.
Some small perf improvements.
Proper deps for python benchmark.
Add fastest regex-dna.
Getting rid of old macro and renaming nregexp! -> regexp!
Benchmark update. Notice replace_all.
Get rid of possibly static data that was necessary for old macro.
Got rid of the Regexp trait. Now a Regexp is concretely represented
as either a dynamic program or native Rust code.
Don't redefine flags in macro.rs