Update pyramid

This PR updates pyramid and some associated libraries.

I got rid of Chameleon templating engine since we only used it in `indext.pt` which is now `index.mako`.

pyramid debugtoolbar has been improved quite significantly and is more user friendly. For more documentation you can read:
http://docs.pylonsproject.org/projects/pyramid-debugtoolbar/en/latest/

In order to understand the changes for pyramid-mako please read:
http://docs.pylonsproject.org/projects/pyramid/en/1.5-branch/whatsnew-1.5.html

I made all the tests everything seems to be fine (geoadmin and api included)

Please test and let me know if you encounter any issue.

Remember that if you want to clean your project, you can use the following commands:
<pre>
buildout/bin/buildout -c buildout_cleaner.cfg
buildout/bin/buildout -c buildout_<username>.cfg
</pre>