v0.6.4 release

Merge branch 'version-bump' of github.com:scribblemaniac/pencil into …

…bugfixes

v0.6.3 release

Version bump v0.6.2

Merge master branch into release branch (v0.6.2 RC1)

Version bump 0.6.1

A missing change of 7ff64b0

The 4th release candidate of 0.6