Merge pull request #2 from dliebner/port-js-improvements

Port improvements from the main polylabel (js) lib

Update Polylabel.php

Fix to the fix

Div by 0 fix

Readme update

degenerate polygons test case fix

Added debugging param

Test bugfixes

Turn on test debugging

Test formatting

Moved test.php to the correct directory

Ported code and tests

Initial commit