Fixes #50 and related non-English strategy issues.

Specifically...

* Bogowin was only being used for English-like dictionaries.
I suppose the bogowin numbers might change a bit from
dictionary to dictionary, but I think it's quite plausible that
the numbers are similar for all dictionaries.
* This fixes bogowin always returning 100 or 0.
* Make the strategy code more fine-grained, so that if it
has some strategy files and not others, it will use what it
has.  JKB recommended a long time ago that I add a generic
worths file to give the blank a high worth, but it wasn't being
used because most languages didn't also have a syn2 or
a superleaves.  Now it will.  Also, the vowel-consonant
balance computations don't use any strategy files at all,
but they were also being skipped if you didn't have every
single strategy file.  Oops.
* The strategy computations would sometimes do
unexpected things if the leaves weren't alphabetized.
They now look at the alphabetized version of the leave.
* A couple more conversions to ranged-for loops.

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