Editing while reading

Markup literals.
Break long lines.
Prefix shell commands with `$` (convention for normal user prompt) instead of `#` (root).
Move out bug cruft to the relevant tracker issue.
Some copy editing.
Document default roles in ``dexterity.membrane``

Thanks to @jensens in http://sourceforge.net/p/plone/mailman/message/32904371/
Editing while reading

Markup literals.
Break long lines.
Prefix shell commands with `$` (convention for normal user prompt) instead of `#` (root).
Move out bug cruft to the relevant tracker issue.
Some copy editing.
Document default roles in ``dexterity.membrane``

Thanks to @jensens in http://sourceforge.net/p/plone/mailman/message/32904371/
Markup literal, tidy.
Keep sentence on one line for translation
Merge pull request #142 from jean/master

Document dexterity.membrane default roles