Some fixes.

Added sample gerber files for test (gerbview has problem with 2 files)

Added sample gerber files for test (gerbview has problem with 2 files)

Added sample gerber files for test (gerbview has problem with 2 files)

* Remove unnecessary options from EESchema print dialog.
* Expose page setup dialog to fix page orientation problems on wxGTK.
* Added custom schematic print preview frame.
* Print dialog and preview frame remember size and position settings
  between sessions.
* Added monochrome and print sheet reference settings to project file.

removed global variables and a lot of redundancies

hide/show rastnest in pcbnew is currently not working, will be fixed soon

Pcbnew :added option to show/hide footprints values and/or references

Removed old color and visiblity dialog
work in progress.
See also TODO, P0)

Better code in fast draw grid algo (drawpanel.cpp):must be faster, and minor refresh problems removed under wxGTK