Release 0.1.8

• #9 Enable incremental generation, reported by rnowosielski
• #5 Change the way the code in invoked so that multiple formats can be generated simultaneously, reported by rnowosielski
• #41 Fix for checkout, reported by rnowosielski
• #39 Add ability to show tickets that are completed but not part of any version, reported by rnowosielski
• #38 Expose the reporter in the release notes, reported by rnowosielski
• #36 There is no way to represent tickets that were committed after any label, reported by rnowosielski
• #35 Solve the stash markdown compatibility issue, reported by rnowosielski
• #34 Adding option for multiple writers, reported by rnowosielski
• #30 fixed import statement, reported by mkovacioglu
• #29 Enable multiple ticket sources, reported by rnowosielski
• #28 Allow multiple issue sources to be used simultaneously, reported by rnowosielski
• #27 Fixes that resulted from first usage of version 0.1.2 with ivbcore, reported by rnowosielski
• #25 Provide more configurability around git checkout, reported by rnowosielski
• Stability improvements