Try to fix block selection issue with some windows managers.

Added boost::polygon (experimental)
Added experimental zone fill calculations with boost::polygon
Added patches from Yury Khalyavin

Fixed a minor issue when creating a netlist. for nets having global labels, global label names were ignored when naming this net.

fixed bug 603481. Better bitmap2component look. fixed some locate problems for footprints using polygons (mainly created by bitmap2component)

Cleaning code: moved some help strings used both in toolbars and menus in a single file help_common_strings.h,
in order to avoid slightly different help strings for the same command, and avoid some not needed  translations.

    In netlist generation, changed the rule to calculate netnames of nets with labels:
    Previously, named nets (i.e. nets with local, hierarchical or global labels) have their name
    defined by the first label found in list.
    So net names could be changed without really changing the schematic.
    Now the names are calculated from the rules (by priority order) :
    1 - use the most top level labels in hierarchies.
    2 - use global labels first, local labels next (hidden power pins names are global labels).
    3 - use alphabetic sort (so, if GND and AGND are connected, the net will be always named AGND,
    and adding a VSS connection cannot change the net name)
    So power nets and nets that have more than one label cannot have their netname changed
    if there is no actual change relative to these nets names in schematic

Set minimum cmake version to 2.6.4. Added footprint name edition in the module editor dialog properties.

output 8 user fields

(scale now allowed from 0.01 to 100)

Many stubs are removed but they are connected to a zone.

* Require CMake version 2.6.1 on Windows and version 2.6.0 for other systems.
* Update FindSubversion to version from CMake 2.6.1 (localization issue solved).
* Remove FindwxWidgetsCVS and use the default one (some issues solved upstream).
* Formatting style changes.

Modified recent change on svn change: "PCB edge always printed when PCB edge layer not selected" was incorrect for eeschema and gerbview
solved bug 2070228

demos installation added in CMakeLists.
Temporary problem with help appeared.

* made schematic loading of 'GLabels' dependent on the schematic file version (currently at 2). 
If the version == 1, these are loaded as hierarchal labels
* made text labels global in the herarchy, consistent with their historical usage.