TMW->EWTS:

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.

source/org/thdl/tib/text/TibTextUtils.java

@@ -1015,7 +1015,9 @@ public class TibTextUtils implements THDLWylieConstants {
                 // breaks TMW->ACIP and TMW->EWTS.  Test it.  When it
                 // does, revamp TGCPair to have a set of vowels.  The
                 // output order should be consistent with the
-                // Unicode-imposed order on vowels.
+                // Unicode-imposed order on vowels.  (Maybe modulo the
+                // CCV bug in Unicode w.r.t. above- and below-base
+                // vowels?)
             } else {
                 // number or weird thing: