updating qwtpolar with latest source

[mach0]

updated qwtpolar with latest source (currently 1.1.1) by copying source files into qwtpolar-1.0 folder and renaming the folder to qwtpolar-1.1 (as 1.0 is outdated anyway)
there is still the qwtpolar-0.1 folder inside (historical?) which could be deleted too.
Mentioned in #1676

Compiling perfectly on debian using internal qwtpolar .

Signed-off-by: Werner Macho werner.macho@gmail.com

[mach0]

should probably be tested on Windows and Mac

[m-kuhn]

Sorry @mach0

Better somebody if somebody using ubuntu takes care of that job.

[m-kuhn]

See also #1676

Alternatives, quoted from #1676

• Verify internal qwtpolar compatibility with Qt5 and update if appropriate
• Build external packages for upstream (personal favorite)
• Disable support for QWTPolar based features when external QWTPolar is unavailable

This PR implements the first solution, my personal favorite is another one

[mach0]

I know - I mentioned #1676 , but as said .. debian has no qwtpolar package, and unless somebody creates either the package and/or rewrites the code to disable qwtpolar based features when external is not available (not really my favorite) we should at least keep the code updated .. :)

[jef-n]

Updates to src/app/CMakeLists.txt missing, but QWT for Qt5 is also missing in debian

[m-kuhn]

qwt6-qt5 is available in vivid (15.04)
Alternative approach would be to have a git submodule for qwtpolar.
My preferred approach would still be to make it an external dependency and optional.

[m-kuhn]

See #1726