Copied form HarfBuzz.old Indic data.  These are below and post
consonants.  This is temporary.  Read the comment in the patch.

Using an incredible tool called Ragel.

Matches OT types now.

Nothing functional in there yet.

So far, we're parsing IndicSyllabicCategory.txt and IndicMatraCategory.txt
fils from Unicode Character Database and store them in an array to be used
by the shaper.  Also hooked up the shaper, but it does not do anything
right now.

We apply all of vert, vrt2, vkrn, valt, and vpal.

Also change the Version type to avoid similar bugs in the future.

Reported by Grigori Goronzy.

k is the index, not j.

Reported by Tom Hacohen.

Respectively, separate planner from the actual plan.

There are no API guarantees just yet, but I *expect* that no
incompatible API changes to happen before 1.0.0.

Update NEWS.

Caught by "make check-symbols".

Shows undocumented symbols.

Caught by "make check-valgrind".

Adds check-valgrind among other modes.  We do not run under gtester by
default anymore.

We're not at 100% coverage yet, so do not enable the test by default.

The versioning is automatic.  For now, soname-major is 0.  With
the 1.0.0 release it will jump to 1 and stay there forever.