Merge pull request #66 from sogis/aproach

added spatial printing-information
Fixed postgres provider identification
Merge pull request #67 from sogis/aproach

bits and pieces
Merge pull request #68 from elpaso/master

Fixed postgres provider identification
free theme-switcher whaldow
post2get
specific sogis
added printpostget.wsgi
small bugs
added optional 'thumbnail' parameter to theme switcher config
added optional layerImageFormats config to GlobalOptions to override the image format for some layers;
fullColorLayers is merged into layerImageFormats on init
small bugfix
fix layer tree init if visibleLayers is empty
Merge remote branch 'upstream/master' into aproach
added printpostget
added printpostget.wsgi