Fixed "Slash in Milestone name prevents displaying dependency graph". The regex in `match_request` was improved, allowing the `realm` and `id` to be extracted from the request path, and the `process_request` function to be refactored to better utilize these request arguments.
Fixes #18: Documentation referred to `blockedby` custom field as `blocked_by`.
Fixes #17: Escape ticket summary that is used in a graphviz node.
Fixes #15: Clarified license as 3-Clause BSD, added license text in COPYING file and added header to each py source file. Bumped version to 3.03.
Merge pull request #1 from coderanger/master

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