Support more assignment expressions, etc

Case 111813: Support more assignment expressions in method

Changes:

    * Support most valid Perl expressions in the method
      PPIx::PerlCompiler::Statement->isa_nonlexical_assignment()

    * Remove useless PPIx::PerlCompiler ensemble package

    * Remove .perltidyrc from MANIFEST, but keep in repo

    * Add authorship information

    * Increment version to 0.03
Merge branch 'case111813' of git://deathstar.dev.cpanel.net/~erin/perl-critic-policy-compiletime/erins-perl-critic-policy-compiletime