Add a getProperty() method for document element.
Implementing __neg__ ignored for custom classes #228
Woops copied too much
Merge pull request #231 from Jeff-Tian/documentModule

Add a getProperty() method for document element.
Merge pull request #233 from danbornside/master

Implementing __neg__ ignored for custom classes #228
Add debugger statement
Merge remote-tracking branch 'upstream/master'
Fixes firefox issue regarding precision error