Pcbnew: enhancements for blind/buried vias palcement, and save blind/buried vias allowed option in .kicad_pcb file

Pcbnew: Fix a bug when reading a netlist which forces pcbnew to read lib files to find a footprint even if the right footprint is already loaded (which explains the long time to load netlists)
Netlist dialog: add option to report only most important messages. Useful for large boards.
class REPORTER: add features to allow a basic message filtering (flags to report all/warning/error messages)
Fix Bug #1214599 ( tools are deselected on Move command )

Lay basis for a more full featured usage of boost, including compiled libraries such as unit_test_framework, system, etc.  Move headers now into boost_root/include/boost/.

Others: fix very minor issues.

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.

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.

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.

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

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

This keeps it out of the KiCad mode path, making that leaner and less confusing about
what is supported in KiCad mode.  Within KiCad mode, treat quoted vs. non-quoted tokens
as the two general categories, with non-quoted having sub-categories.  Eliminate  
an unimplemented, unused function declaration in DSNLEXER.
 
Improve the output formatting of THROW_PARSE_ERROR().

in *.kicad_pcb file loading times.

Replace in EDA_TEXT::Draw the parameter EDA_DRAW_PANEL* aPanel  by EDA_RECT* aClipBox, which is the actual parameter used by Draw.
This change make more easy to  use this function when a EDA_DRAW_PANEL canvas is not used to draw texts.
Remove dead code in worksheet.cpp.

* Do not fail to build when wxWidgets is built with either --with-gnomeprint
  or --with-gtkprint are not configured.  Only display warning.
* Move warning code from include/common.h to common/common.cpp so it only
  shows the warning once instead of every source file that includes common.h

This is limited to round tripping the lines of commented text in the
loading and saving to disk through PCBIO::Format() and PCBIO::Parse().
No editing of the comments is given.

Pcbnew: netlist dialog: add silent mode option, and tool tip to the 2 options (dry run and silent mode)
dialog_display_info_HTML_base: derived now from dialog_shim.