This converts the KWSys license to a pure 3-clause OSI-approved BSD
License.  We drop the previous license clause requiring modified
versions to be plainly marked.  We also update the KWSys copyright to
cover the full development time range.

ENH: add support for the Portland Compiler to CMake, can build cmake and the tests pass (except the wrapping tests, which fail to link to the g++-compiled Qt)

Alex

COMP: Adding work-around for CMake dependency scanning limitation.  Any configured header included by KWSYS_HEADER() in a .c or .cxx file in kwsys itself must use this hack to get dependencies.

ENH: Split kwsys_std into kwsys_ios and kwsys_stl in order to avoid std namespace pollution and support more platforms.

ENH: Added use of KWSYS_HEADER macro in c and cxx files to include kwsys headers through their configured namespace.