[tests] disables common_fixed_map since it reliably goes OOM
[grid:output.pgf] fix for compilation failure
[test.grid_information] fix deprecated message
[test.la_container] small fix
[grid] another re-fix for cube provider
[functions] disabled explicit instantiations everywhere

this requires fixing by @ftalbrecht
fixes headercheck
[common.configtree] mark as deprecated
[common.string] add specialization for const char * and fix test failure
replace ConfigTree with ConfigContainer (simple search and replace)
Merge branch 'master' of https://github.com/wwu-numerik/dune-stuff into ConfigContainerTree

Conflicts:
	dune/stuff/test/test_common.hh
[playground.functions] removes deprecated pdelabadapter and norm
[la] fixes IstlDenseVector's size method
[test.common_configtree] adjust include
[tests] adds test for corner range
[common] fixes corner range implementation
[tests] adds new (disabled) grid types for provider types

@tobiasleibner please have a look at this todo and the one in
common_ranges.cc sometime, prolly needs some changes to the grid
provider implementation to enable the embbeded grids
[fem] fixes fem-eoc compile
[common.parameter.configcontainer] add constructors
[common.parameter.tree] add bool overwrite to add method + minor fixes