Cmake build: Moved creation of variable LYX_GIT_COMMIT_HASH to development/cmake/scripts/LyXGetVersion.cmake.

1.) The only file which needs this define is src/version.cpp. Our use in config.h
resulted in recompiling most of our sources.
With this change, only version.cpp needs to be recompiled.

2.) Without reconfiguring, the old commit hash was still valid. Now the
detection of commit hash is done at compile time.
Forgot this file in the last commit
Check the correct macro for conditional include of lyx_commit_hash.h
Add lyx_commit_hash.h.cmake to distribution tar ball
improved mount state check
Cmake-gmo creation:  Recreate ${_lyxname}.fmt.pot only if it really changes
Fix typo spotted by Hartmut.
Fix grammar error spotted by Sian Mountbatten
Tweak the shape of the parbreak separator.

The shape of the parbreak separator is slightly changed in order to
better distinguish it from the forced newline. This allows using the
same color of the plain version without risk of confusion.
ja.po: update for master from Koji
revtex4-1.layout: remove unnecessary preamble code

- \lovname was already added to REVTeX 4.1 in 2010
- REVTeX does purposely not allow to color text, see the discussion in bug #4625
revtex4-1: port changes from branch

also add the todo list to support all commands used in REVTeX's official sample document.
Sort debug options in the message pane by string. This makes it
much easier to find what you need, especially when we're trying
to help users. Previously, they were sorted by their enum values.
Make static variables used in DocBook output thread-safe.
Whoops. Forgot to add before amending commit.
revtex4-1.layout: update to latest REVTeX 4.1

- added support for the command \onlinecite
- some style and whitespace issues
- revtex4-1.lyx: update accordingly
Fix warnings.
If we successfully save a file but fail to move it to its proper location,
then, if we made a backup and the original file was not a symlink, we moved
that file, so it will look to the user as if it was deleted. This is bug