Refactoring

Fix compile time warnings

Create a backup every time a font is saved

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

Merge ../birdfont-2.x

Merge branch '2.x' of github.com:johanmattssonm/birdfont into 2.x

Ignore tripple clicks in OTF table

Merge ../birdfont-2.x

Fix glyph selection in alternate tab

Hide resize handle when objects are moved and merge birdfont-2.x

Reset replacement glyph in OTF feature tab

Merge ../birdfont-2.x

Redraw moving canvas and keep OTF feature tab open

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

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

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

List all alternates

Apply OTF substitution in kerning tab

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

Update translations
A complete Italian translation was contributed by TranSuppo.

Select replacement glyph in OTF feature tab
All alternate glyphs and the glyph that will replaced is referenced by name
(not unicode).

GUI for selecting OTF feature tags