adding hi res image for the welcome logo
making the tags from select2 lib to look like tagspaces tags
adding hint in the file create dialog for the format of the tags
setting the min lenght of the tags to 2 chars
setting space and comma as tags separators for the select2 lib
correcting #23
correcting opening of the containing folder functionality in node-webkit
correcting the opening of the containing folder in the file viewer
increasing the version to 1.7.5