Merge branch 'master' of github.com:johanmattssonm/birdfont

Merge branch 'master' of github.com:johanmattssonm/birdfont

Rename FastPath to PathObject

Use other types of graphical objects

The previous version uses only simple paths this commit makes it possible to
add other objects like circles, rectangles and text. The refactoring
is the first part of the full SVG implementation.

White space fixes

Change orientation icon to reflect the current orientation

Show orientation when path orientation changes

Fade out orientation arrow

Show curve orientation with an arrow