Fix bug 910364: When a footprint saved in a .mod file is not on front layer and/or not with orientation 0 degree, the Module editor load it incorrectly.
note:  the Module editor save it with default orientation and layer, but the archive function does not, so some footprints can be not editable.
TODO: modify the Archive Function to use the default layer / orientation.

Minor cosmetic enhancements.
Pcbnew: more workd abput connection algorithms (work in progress)

Fix bug 880132 (Justify not correct)
Note: justifications are now always relative to the text, in libedit (as before) and schematic editor:
if rotated, justification is rotated, because in Pcbnew rotation can have any value.

Pcbnew: connect.cpp: enhanced ( faster and more powerful ) algorithm to calculate connections between pads.
Code cleaning.

Gerbview: very minor fix

(With a minor change for icon_cvpcb.svg: better look on dark backgrounds)
Fix bug 668200.

Remove obsolete foldr resources/icons.
Updates svg icons in folder resources.

Fix compatibility issues with old xpm icons.
Add or update .xpm and .ico files for shortcuts and taskbars
Remove artwork folder.

* Replace use of wxICON by new icons declaration.
* Remove unused files.
* Fix filenames inconsistencies between old and new icons.
* dialog_erc handle variable size icons in erc matrix.

Fix minor other issues.
Remove unused files.

* Added checks for Inkscape and pngcrush when MAINTAIN_PNG mode is enabled.
* Rebuild PNGs with transparent background.