refactor roots & list names; smash case

[yakra]

• Refactor checks for root & list name uniqueness and Route/ConnectedRoute correspondence for improved efficiency & error reporting and more concise code
  • ClosesChecking for duplicate list names #316
• Perform fewer case conversions on AltLabels & AltRouteNames for increased speed Processing traveler list files
  • Closessmash case #319
• C++: clean up a couple classes' static member definitions
  • Closes.list processing: lower() -> upper() yakra/DataProcessing#29

Python:
2/3 the processing time, 3/2 the speed, Processing traveler list files

C++
Less of an improvement than I'd have hoped for, but it's still something. This helps out most on BiggaTomato, my system most constrained by memory bandwidth & cache size. (Well... there's also my laptop, with its 512K L2 cache. I'm not even bothering testing speed on that single-core dinosaur.)
Compare the graphs in #313:

[yakra]

I wrote:

I'll hold off on a pull request until the errors are fixed on the HighwayData side.

Oops, guess I forgot I said that. :)

Still waiting on 3 fixes:

[85.8] ABORTING due to 9 errors:
1: Duplicate alt route name in tur.o005gor: 'TUR O5gor' already points to tur.o005gor
2: Duplicate alt route name in tur.o005akh: 'TUR O5akh' already points to tur.o005akh
3: Duplicate main list name in ar.ar549: 'AR AR549' already points to ar.i049tex

[jteresco]

Good to go now?

[yakra]

Good to go now?

The last conflict, AR549, was fixed about 7 hours ago. Good to go.