Add test case for GH #455.

This bug has been fixed via adamkennedy/PPI#92
Add tests to cover false positives reported in GH #600.
Added test case to cover GH #496.

Even though PPI 1.216 did improve parsing of the augmented
assignment operators, this bug actually lies in Perl-Critic.
I suspect we need to make the Policy understand that the left
and right side of a postfix control should be treated as
separate expressions.
Add test case to cover GH #451.

This is fixed in the next release
of PPI via adamkennedy/PPI#92
Remove TODO marker from test. Code fixed in PPI.

See https://github.com/adamkennedy/PPI/issues/92
I think this was a typo in the test case.
Add test case to cover GH #192.

The parsing of hash constructors has been improved
in PPI and this bug is now fixed via adamkennedy/PPI#92.
Add failing test case to cover GH #496
Require newer PPI and note it in the change log.

Today is the day PPI 1.220 will be released.
Bump VERSION to 1.123.
Remove janky old tools.

svnkeywords is irrelevant now that we are on
git, and I highly doubt anyone uses the other two.
Don't mention Makefile.PL in the INSTALL guide.

We only support Module::Build now.
Get rid of defunct Ant builder.

We used to run a TeamCity continuous integration server
that used the build.xml file. But that is long gone. We
should just use Tavis instead.
Update MANIFESTS, following file removal.
Revise developer instructions, now that EU::MM is not supported at all.
Experiment with a Travis build config.

No idea if this is going to work -- just a shot in the dark.
This seems like a more sane Travis build.
Self-compliance.
Exclude symlinked files from MANIFEST.