Add Imaginary/Complex notation and Symbol percent-strings support

[elia]

As a heads-up, Symbol percent-strings are also added by #44, #58

[trvsdnn]

@sorbits hate to bug you, but any reason why this can't be merged – would clear up two other pull requests that have been lingering.

[infininight]

This is my fault, I've been working to improve this and #58 to try to improve the scoping of the items. The string scope for this seems improper to me so I've been trying to come up with a succinct way to have rules to mark them up with individual scopes but I think that's impossible so I'll need to just make numerous rules to match each version and type, it will end up being verbose but will better match the various types.

[elia]

@infininight IMO something should be merged and then refined, I don't think people will notice if for a couple months the scope names are suboptimal — of course this doesn't stand if you're about to release the complete solution

[trvsdnn]

Thanks @infininight. It's been over a year, might as well take the time to feel good about the solution.

[elia]

Sure thing :)

[wyattisimo]

@infininight bump

[infininight]

Added in a different manner in a6a17019df8899528485e5d500be2dbf94dafc61.