started separating the mocha cli program into parts to make sections reusable by custom runners.

parse is much much much easier now.

as its the easiest way to simplify the usage and ensure everything is called as it should be.
otherwise its too easy to introduce bugs with things like --colours and --opts.

its available as program.globals

added requires and globals to command once parsed.
making it really easy to get it.

set program.opts before and after parsing. And make it not ennumerable.

rename optsArgs to optsFile

added tests for parser and cli [wip]

…ions

as this allows parseOptions, rawArgs, and parse to work as expected.

relocated all args manipulation out of mocha and _mocha.
argv is no longer mutated. I tried to avoid implementing such a change
but its impossible to use multiple makeCommand instances without this safety.

fixed oopsie removing Mocha from cli
added a convenience method loadOptsFile which will surely be a common use case

to use Commanders recommended way of collecting multiple values.
also means less magic in parseOptions.

…cli_parsing

# Conflicts:
#	bin/_mocha

using a custom parser instead of Commanders.
updated test cases
expanded args in `mocha` because it needs to happen before the call to `_mocha`

set program._name in makeCommand instead

added more unit tests