Z3c.ptcompat

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- Make tests pass in a binary release by not relying on the pacakge structure.

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- Added a test requirement explicitely.

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- Added support for browser:addform, browser:editform, browser:form,
and browser:schemadisplay directives.

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- Fixing brown-bag release 0.5.1.

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- Added missing ``lxml`` test dependency.

- Fixed tests to work with current version of z3c.pt.

- Fixed autor e-mail address.

- Added doctests and change log to long description to show up at pypi
homepage.

- Reformatted release dates in change log to use iso dates.

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- Added module which patches ``zope.app.pagetemplate`` such that
template classes depend on ``z3c.pt`` for rendering (import
optional). [malthe]