Gerbview: Add support for recent File Format Attribute metadata, both for X2 Gerber file format and X1 (R274X) format.
Pcbnew already uses this attribute when creating Gerber files.
Because Gerber files using this attribute identify the board layers stackup, Gerbview (if this attribute is defined) can sort gerber images stach up like the board.
(in layer manager, just right click to access to the sort menu)

Try to fix an issue on Ubuntu/Unity for some dialogs which are not displayed. Adding GetSizer()->Fit( this ) after last dialog "geometry" change (size for instance) or Raise() if the window is not a dialog fix it.
Partial fix. There are few cases where the frame is still not displayed.
Looks like a Unity issue, not a Kicad issue.

Try to fix issues on Ubuntu/Unity for dialogs which are not displayed: adding GetSizer()->Fit( this ) in some other dialogs

Try to fix an issue on Ubuntu/Unity for some dialogs which are not displayed. For most, adding GetSizer()->Fit( this ) in dialog constructor fix the issue, but at least one dialog still is not displayed.

Fix remark 1 in Bug #1393277 (the option "use absolute paths" acts reversed: ticked exports relative paths, unticked exports absolute paths)

* Make title capitalization consistant.
* Replace some instances of module with footprint.
* Use angle instead of orientation where appropriate.
* Remove abbreviations where it made sense.
* Coding policy fixes.

* Make "Drawing" string translatable.
* Add segment length to message panel.
* Add segment angle to message panel.

geometry: IsSolid() and Move() methods, segment overlap detection, some improvements in SHAPE_LINE_CHAIN class.

- fixed walkaround bug causing unwanted overlap/clearance violation when the first segment of trace being laid intersects the obstacle's hull at the same point twice (ie. goes in, turns around and goes out).
- fixed placer bug not splitting the start segment after toggling via placement or changing trace width

- re-worked PNS_LINE_PLACER and PNS_ROUTER classes a bit, removing duplicate class members
- cleaned up Andrew's blind/buried via fixes
- fixed 'custom via width' dialog bug updating the width even when closed/cancelled
- fixed incorrect radius of drawn microvias

Pcbnew: fix Bug #1391561 (PCBNew segfaults on BOM creation).  Does not happen on all platforms. Could be due to use of data just previoulsy deleted.
Very minor other changes.

pcbnew: Modules can be selected with block selection tool without including texts & references (GAL).

pcbnew: Allows selecting module edges in module editor, when they are covered with other items (GAL).

pcbnew: Fix persistent multiple items selection box that stays after selecting a polygon/line (GAL).

Minor doc update.

Apply patch from Cirilo Bernardo with some minor changes: mainly allows also the solder mask layer and keep ref and value fields on the silk layer.