DMRECON: specify defaults in mvs::Settings only
UMVE: use default values from mvs::Settings

Always read default values from mvs::Settings so that they are the same
in dmrecon and UMVE.
Merge pull request #35 from Waldteufel/usedefaults

UMVE: use default values from mvs::Settings
DMRECON: specify defaults in mvs::Settings
Merge remote-tracking branch 'upstream/master'