1st step to high quality pdf export using Cairo
Icon for PDF export added
PDF export now produces an empty PDF
1st steps to separate Cairo based grid renderer
Grid lines are now exported correctly to PDF via Cairo
Background and darker color preference for border lines in PDF export added
Text can now be printed to PDF via Cairo. Still very incomplete
Standard cell size improved, PDF export via Cairo now supports text fonts
Bitmaps now work in PDF export
Code quotation switched to Unicode strings,
Extra check for empty strings for jedi code analysis,
Focus event framework for EntryLine that may improve selection mode
Quoting fixed, further work on cairo pdf export
Merge branch 'v0.4' of github.com:manns/pyspread into v0.4

Conflicts:
	pyspread/src/actions/_grid_cell_actions.py
	pyspread/src/gui/_widgets.py
PDF export now wraps text in cells
Issue #91: Borders can now be changed for whole ros and columns
PDF export now comprises horizontal text alignment
Vertical alignment added to PDF export
Text can now be rotated to 90, -90 and 180 degree in PDF export
Removed deprecated dialog size optimization call
Fixed breakage in gpg key choice with wxPython 3.x
Merge branch 'master' of github.com:manns/pyspread into v0.4
Fixed two unit tests

Conflicts:
	pyspread/src/lib/test/test1.pys.sig