[demos] remove vtk output from burgers demo
[gui.qt] add save (to vtk) button
[gui.qt] only show save button when saving is possible
[gui.qt] do not save if user hits cancel
[tools.vtkio] use flatten_grid and let user specify data codim
[gui.qt] add filename attribute to GlumpyPatchVisualizer.visualize()
[algorithms.greedy] updated messages
* fixed a typo
* drop [] around scalar quantities in output
[la.bysic] fixed error message
[algorithms.basisextension] fixed typo
[defaults] added compact_print option
[parameters.base] added compact printing of parameters
* enable with settings defaults.compact_print = True
[core.exceptions] added ConfigError
[la.gram_schmidt] use correct default
Merge remote-tracking branch 'origin/master' into blocks
Merge branch 'master' into blocks