Cosmetic enhancements. Eeschema: in libedit the Value Field is n more editable in the field editor dialog (due to recent changes in library code)

minor cleanup. minor enhancements. Finish file housekeeping. add Bug 682586 fix from Mark van Doesburg.

Pcbnew: minor code cleanup and enhancement in zone filling. Commit patch from Marco Mattila. Eeschema: minor bug fix about dangling ends. removed obsolete file

Eeschema: fix bug in load_one_schematic_file.cpp: error about files version, that create errors for hierarchical labels.
Pcbnew: cleaning code in block.cpp, and modifye previous way to calculate block size in block command, because old way creates unexpected behavior in block rotate and block flip.
Pcbnew: Fix a bug in plot silkscreen layers.
Cvpcb: Fix compilation issue under MACOX

can be deleted later if they exist in the headers, or moved to 
headers if they should exist in the headers.

Fix bug in PolyLine.cpp, Fix bug in DRC calculations (see changelog). Cvpcb: move dialog files in dialogs/