Others: fix very minor issues.

* Fix the last parts of Bug 1204712 by removing DateAndTime from library file and documentation file formats. They weren't being loaded anyway.

- Comment fix

* Use a regular expression to enforce more stringent bus label testing.
* Add validator to edit label dialog to prevent space character from being
  used in labels.

Pl_Editor: fix copyright in files. Enhancement when creating new items.

REMOVE: vias from specctra DSN export which are not in a netclass.  Use only netclass based via sizes in freerouter.
Some of the vias in the class-less list were setting the drill hole size to zero and this made no sense to freerouter.

Replace the wxFilePickedCtrl in Option Page dialog by an usual wxButton + wxTextCtrl, because under wxWdgets 2.8.12 the look and the behavior is very different between Windows and Linux.

Replace the wxFilePickedCtrl in Option Page dialog by an usual wxButton + wxTextCtrl, because under wxWdgets 2.8.12 the look and the behavior is very different between Windows and Linux.

dialogs which allow editing of component properties.  The button
is active when the table row cursor is on the DATASHEET field only.
When active, and your datasheet is a URI, then your default
browser will be launced to show that datasheet if it can find it.
This incentivizes use of http:// links for datasheets.

ENHANCE: specctra export Edge.Cuts "endpoint mismatch error message" was not showing exact coordinates with sufficient resolution

Pcbnew: footprint wizard dialogs: minor fixes, and fixes a not working parameters dialog under Windows, due to an incorrect Printf format.
remove scripts/packagesrc.sh, fully outdated (still refers svn repo)  and not commented.

REMOVE: USE_PCBNEW_NANOMETERS by making it the only way to go in pcbnew, effectively removing the deci-mils build.

was simply a pointer to an object on the display list.  At times this object
would disappear from the display list, in the test case because of a concatonation
of two wires, and if you then tried to clone the non-existent object you'd get a 
crash.  This was not merely a bug, but a naive design choice. IMO.
Now the item to repeat is cloned, so will never also be on the display list.

formatting and fix selection clarification bug in pcbnew, could not move reference text when hidden under another footprint

must be defined if that is the build type wanted. This only affects a text string
anyways, is not particularly important other than telling user from which code
branch  the source came.  

2) Change name of "testing" to "product" in that same description within
common/build_version.cpp.  "testing" made it sound frightenly unusable.

Pcbnew: footprint wizard dialogs: minor fixes, and fixes a not working parmeters dialog under Windows, due to an incorrect Printf format.

* Added modified CMake FindPython... modules to support using Python-a-mingw-us distribution when building Windows scripting support using MinGW

fix interface mapping slip-up in wxPoint EDA_DRAW_FRAME::GetCrossHairPosition( bool aInvertY ) const

Save grid origin in .kicad_pcb files only if not 0,0 (to keep compatibility with previous versions of pcbnew, mainly the stable version)
Very minor other fixes (set modify flag when grid origin is moved from the dialog grid)

split expression into two lines for verification while using debugger that GetScreen() is a virtualized call.

*) add hotkey for setting the grid origin as 'S', in board editor, module editor.
*) re-position the function interface for cursor movement from BASE_SCREEN into
   class EDA_DRAW_FRAME.  This is a prelude to getting rid of BASE_SCREEN or
   splitting it up.

Minor fixes. Minor code cleaning. Pcbnew: better iniatilization of members in DRAWSEGMENT, TRACK, EDGE_MOD (not bugs: just useful when using python scripting).

Minor code cleaning. Pcbnew: better iniatilization of members in DRAWSEGMENT, TRACK, EDGE_MOD (useful when using  python scripting).

convert to UTF-8, eeschema cannot load LATIN1 strings anymore.

All source files are supposed to be UTF-8 now.  Although not a source file, my editor
was tripping on this file when grepping.