Eeschema: cleaning code. Start work to enhance annotation algorithm.
Already added an option to annotate using sheet number (sheet 1 uses numbers 100 to 199, sheet 2 uses 200 to 299..).
Works fine if deleting existing annotation, but needs work to be used when the existing annotation is kept .

Fix bug in SCH_SHEET copy constructor (size not copied, so copied hierarchical sheets have a 0 size), and a minor bug in block save.

fix bug 692240: a subtle bug in LIB_COMPONENT::LocateDrawItem() that destroys DefaultTransform matrix.

Eeschema: in component properties dialog, add control for fields texts justification, like in Libedit.
Fix some Doxygen warnings.

Eeschema, Modedit: void fields (mainly the footprint field) now cannot be selected when click on them.

Eeschema: fix issues in drag command (mainly hotkey command and forgotten wire ends connected to components to drag).
 Rename EDA_Rect::Inside to EDA_Rect::Contains ( EDA_Rect::Inside( const EDA_Rect& aRect ) was very ambiguous )
 Fix some Doxygen warnings and erroneous comments; Add comments.

Minor cosmetic enhancements.
commint forgoten files in boost lib.

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