Merge pull request #21 from Barrucadu/creole-parser

ANTLR-based parser for WikiCreole (https://jira.int.corefiling.com/browse/REVIKI-388)
Implement in-table markup.

Specifically, the following are allowed:
 - Ordered lists
 - Unordered lists
 - Code blocks
 - NoWiki blocks
 - Lines of text.
Don't break the last list item in a table
Allow table cells to contain multiple InTable nodes, and define START for table cells to be whitespace-insensitive