[linearelliptic.problems] added visualization of diffusion tensor
[examples.linearelliptic.spe10model1] updated includes
[linearelliptic...OS2014] updated names

* renamed problem   OS2014           -> OS2014::ParametricESV2007
* renamed test case OS2014           -> OS2014::ParametricConvergence
* renamed test case OS2014Multiscale -> OS2014::ParametricBlockConvergence
[linearelliptic.testcases.spe10] updated names

* renamed Spe10Model1Base       -> Spe10::Model1Base
* renamed Spe10Model1Multiscale -> Spe10::BlockModel1
[cmake] added analyze_OS2014 target
[linearelliptic.testcases.spe10] added first draft of parametric case
[test.linearelliptic-block-swipdg] added overrde/final keywords
[test.linearelliptic-block-swipdg] fixed segfault
[linearelliptic.testcases.spe10]

* reenabled guards
* fixed wrong diffusion_factor
[test.OS2014] updated defines
[test.OS2014] updated test name
Merge remote-tracking branch 'origin/master' into OS2014

Conflicts:
	examples/linearelliptic/spe10model1.cc
	test/linearelliptic-block-swipdg-expectations_os2014_2daluconform.cxx
[test.linearelliptic-block-swipdg-expectations] fixed oudated names
[examples.linearelliptic] removed cfg file
[lib] remove old remnants
[cmake] use GridUtils
[linearelliptic.discretizations] removed (until necessary)
[linearelliptic.problems] updated OS2014 name
[cmake] search for spe10 data files
[cmake] create link to spe10 data file in test/