preview-mode: Fix calculation of lilypond-version predicate
add absolute path of Python executable to restart command

otherwise, Frescobaldi would always be restarted using /usr/bin/python
as the Python executable, instead of the actual executable used to start
it the first time
nl.po
avoid numbered format fields in translatable strings
Merge pull request #225 from uliska/lilypond-version-fix

preview-mode: Fix calculation of lilypond-version predicate
Merge pull request #226 from dliessi/restart

add absolute path of Python executable to restart command
Make test output for upstream remote conditional

If someone doesn't have a remote tracking wbsoft/frescobaldi.git
one can't test for it.
Fix color in 'git branch' command

As Janek reported colored git output (user setting)
shows up as color codes in the GUI.
disabling coloring for the current command does fix it.
Fix upstream lookup

When looking for the remote that is tracking the official repo
I relied on 'wbsoft/frescobaldi.git' to be present.
Obviously 'wbsoft/frescobaldi' is enough.
Merge pull request #228 from uliska/fix-color-codes

Fix color in 'git branch' command
Merge pull request #227 from uliska/fix-test

Fix lookup of 'upstream' remote