Remove cast operator that caused Clang warnings.
This fixes FS#1207.

Kudos to Ansgar Burchardt for the patch.

[[Imported from SVN: r7064]]

Capabilities to compute eigenvalues on non-symmetric matrices
Code contributed by Arne Morten Kvarving.

[[Imported from SVN: r7061]]

[[Imported from SVN: r6872]]

print warnings, but continue compilation
(thanks to Tobias Malkmus)

[[Imported from SVN: r6853]]

[[Imported from SVN: r6794]]

[[Imported from SVN: r6792]]

mpitraits.hh forward declares std::pair, which is illegal by the standard, and clang stumbles over that.
Fixes FS#1121.
(Thanks to Steffen Müting for the patch)

[[Imported from SVN: r6791]]

avoid unused variable warnings/error in nullptr test
patch by Matthias Wohlmuth


[[Imported from SVN: r6771]]

avoid unused variable warnings/error in nullptr test
patch by Matthias Wohlmuth

[[Imported from SVN: r6760]]

[[Imported from SVN: r6758]]

[[Imported from SVN: r6751]]

[[Imported from SVN: r6571]]

get rid of the copyright notice for 'uid2029'.  Judging from the single commit he/she/it did that must have been either Thimo, Christian, or me

[[Imported from SVN: r6570]]

[[Imported from SVN: r6569]]

[[Imported from SVN: r6565]]

[[Imported from SVN: r6564]]

[[Imported from SVN: r6563]]

[[Imported from SVN: r6562]]

[[Imported from SVN: r6561]]

[[Imported from SVN: r6555]]

[[Imported from SVN: r5756]]

 * Extended the section on the license in README
 * Added the exception to the COPYING file as well


[[Imported from SVN: r4873]]

1.0

[[Imported from SVN: r4870]]

[[Imported from SVN: r212]]