Adds tagset for Portuguese using Palavras tagger
Adds tagset for punctuation
Fix unicode bug when sending traceback email
Add Pinax template for customization.

Add a copy from pinax_theme_bootstrap/templates/account/signup.html to let us customize it to our needs.
Comment out links to TOC and Privacy Policy.

At present these pages have dummy content, not ready for prime time.
Merge remote-tracking branch 'rhcarvalho/feature/remove-links-to-dummy-pages' into develop
Merge branch 'feature/pt-palavras' into develop

Conflicts:
	pypln/web/apps/core/visualizations.py
Removes 'tagset' from required tags in POS visualization

The code already treats the case of the tagset not being in the database.
If we leave it in the requirements, a request in the url will be treated as 404
because the requirements won't be fufilled.
Fixes UnicodeEncodeError in the missing tag e-mail
Sends used tagset in missing tag e-mail
Adds tagset to the requirements in POS visualization

This means we need it to be present in all documents, so we'll show POS for
them, and this means we'll need to rerun all analysis for the documents that
are there.
Uses `get_object_or_404' instead of try...except blocks to find documents

This also fixes a bug, because the views referenced an inexistent template
('core/404.html' instead of '404.html').
Merge branch 'bugfix/404-template-not-found' into develop
Escapes catch-all in visualizations URL regex

This is part of the problem described in #75
Fixes wrong variable name in the visualization routing view

Fixes #75
Merge branch 'bugfix/visualization-url-regex' into develop
Returns 404 if the user requests an invalid format for an existing visualization
Merge branch 'bugfix/invalid-format-for-existing-visualization' into develop
Shows detected mimetype in the file metadata

Fixes #79
Merge branch 'feature/display-detected-mimetype' into develop