Nice installable script

Features and improvements

• Package tool with setuptools
• Tacitus is runnable now
• Updated readme.md

Clean PRs and Issue numbers

0.3

clean up refs from commit subject

Light issue tracking

Light issue tracking

• Use square brackets
• Added issue tracking url, hard-coded for pivotal-tracker
• Trace tags without v prefix too

Tacitus, first version

Features and improvements

• Trace tags without v prefix too (e.g. 1.12 instead of v1.12)
• Include body details on request
• Renders release notes as markdown
• Parses git history into subject and body
• Parse git tags for previous major version