White space fixes

Spelling

Update items in overview and store font in cached font

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

Show ligature menu

Select first character when overview tab is created

Faster overview tab

Run only one test case on start

Fix XML parser error (bug: 0000058)

Scroll and zoom with tap events and ignore double click events from overview tab.

Fix double quadratic points in TTF generation

Fix memory leak

Benchmark Stroke
Benchmark functions for the old stroke code, it took 17.6873s to create
5 strokes of the test path.