Fixed part of bug 998476 and part of an undocumented bug. Discovered a
new bug, "aM" should be generated but only "M" is.
The undocumented bug was that laMA was generated when lAM should have been.
The part of bug 998476 that was fixed: laM, laH, etc. are now generated.
This does nothing about paN etc.
Some refactoring here; this is not a minimal diff.
Added tests of TMW->EWTS that use ACIP to get the TMW in place
because EWTS->TMW is a faulty keyboard at present.
I refactored the code trying to fit it onto one screen. So not all of the
changes are material to the bug fix.
About this commit: TMW->Wylie for {b.s.d} now gives bsad instead of bas.d.
This fixes part of bug 998476, and is done because Andres thinks it'll work
most of the time. But don't be surprised if an exception comes up in the
future and we have to trivially change the code to catch it.
