fix Plugin\PhpParallelLint to reflect latest upstream changes:
> executable is now "parallel-lint" instead of "run"
> supports --exclude flag (ignore directories)
store errors from parallel-lint as build_meta (key "phplint-errors");
add them to the "Quality Trend" graph on the build view
Merge pull request #209 from elkangaroo/phplint-upstream-update

Update PHP Parallel Lint plugin to reflect upstream changes