add quoting support to tagging

[Caleb Davis]

Tagging (#360) needs to be iterated on. This ticket addresses support for quoting. What are the expected behaviors? In the following examples, user input is underlined, and resulting tags are indented.

• In the simple case (assuming comma-delimited text), the user has a single pair of quotes embedded within the input, such as: meta,'yo dawg, I heard you like delimiters...',humor

  u'meta'

  u'yo dawg, I heard you like delimiters...'

  u'humor'

• what about mixed quotes? (eg user wants you're in the tag) meme,"I don't even...",humor

  u'meme'

  u'I don't even'

  u'humor'

• then, as Will noted in IRC, some users may wish to tag using xml or hierarchical organization schemes. At what point does supporting quoting become complex enough to warrant using a plugin?

tl;dr - introduce support for tag delimiter(s) within a tag. Efforts towards native gmg support go here. Add a new ticket for plugin work

Feel fix this ticket if I'm missing the point or the point is not clear.