Silence shadowing variable warning
Convert line endings (back to?) unixish
Skip t/rt65615.t for FF 5.x, 6.x

<canvas> is broken on some GPU drivers / OSes for these FF versions.
There is little gain in finding out the exact combinations, and little
sense in failing the test suite for outdated Firefox versions.
Guard against ->bridge becoming undef during global destruction

This removes one disquieting error message during cleanup.
New ->xpath() implementation that allows for other result types

This replaces the ->xpath() implementation from MozRepl::RemoteObject. It
allows for returning strings and numbers from XPath queries directly,
depending on what Firefox decides the result should be.

The idea and code were supplied by dfaure.
Also skip rt65615.t on FF 7.x
Bump version to 0.74