copy over 3.4 branch news items

git-svn-id: http://svn.osgeo.org/geos/trunk@3924 5242fede-7e19-0410-aef8-94bd7d2200fb
Ignore unused label

git-svn-id: http://svn.osgeo.org/geos/trunk@3925 5242fede-7e19-0410-aef8-94bd7d2200fb
Replace implicit boolean conversion with explicit nullptr test

git-svn-id: http://svn.osgeo.org/geos/trunk@3926 5242fede-7e19-0410-aef8-94bd7d2200fb
Disable copy ctor and assignment operator where relevant.

git-svn-id: http://svn.osgeo.org/geos/trunk@3927 5242fede-7e19-0410-aef8-94bd7d2200fb
Clean unsafe mix of type 'int' and type 'bool' in operation

git-svn-id: http://svn.osgeo.org/geos/trunk@3928 5242fede-7e19-0410-aef8-94bd7d2200fb
Add explicit cast from double to long unsigned int

git-svn-id: http://svn.osgeo.org/geos/trunk@3929 5242fede-7e19-0410-aef8-94bd7d2200fb
* Replace while(true) with canonical for(;;)
* Warnings clean-up
* Untabify

git-svn-id: http://svn.osgeo.org/geos/trunk@3930 5242fede-7e19-0410-aef8-94bd7d2200fb
Untabify

git-svn-id: http://svn.osgeo.org/geos/trunk@3931 5242fede-7e19-0410-aef8-94bd7d2200fb
Declare QuadEdge and QuadEdgeSubdivision constructors as virtual to correct deleting object of polymorphic type.

git-svn-id: http://svn.osgeo.org/geos/trunk@3932 5242fede-7e19-0410-aef8-94bd7d2200fb
Ignore geos_svn_revision.h, compile and test-driver files

git-svn-id: http://svn.osgeo.org/geos/trunk@3933 5242fede-7e19-0410-aef8-94bd7d2200fb
Add 32-bit build in travis-ci config (#658)

- Add 32-bit builds to Travis CI matrix
- Install gcc-multilib on Travis CI for -m32
- Add IRC use_notice to Travis CI notifications
- Set on_success and on_failure separately for IRC and email
- Ignore _build - convenient for CMake builds

Patch by Mateusz Loskot

git-svn-id: http://svn.osgeo.org/geos/trunk@3934 5242fede-7e19-0410-aef8-94bd7d2200fb
Remove myself from travis-ci notification targets

git-svn-id: http://svn.osgeo.org/geos/trunk@3942 5242fede-7e19-0410-aef8-94bd7d2200fb
Voronoi APIs added to QuadEdgeSubdivision class, with test added

Contributed by Vishal Tiwari

git-svn-id: http://svn.osgeo.org/geos/trunk@3944 5242fede-7e19-0410-aef8-94bd7d2200fb
Hush still-reachable valgrind report by avoiding singletons

git-svn-id: http://svn.osgeo.org/geos/trunk@3945 5242fede-7e19-0410-aef8-94bd7d2200fb
Fix FSF address in license file (#662)

git-svn-id: http://svn.osgeo.org/geos/trunk@3946 5242fede-7e19-0410-aef8-94bd7d2200fb
VoronoiDigramBuilder class + test

Contributed by Vishal Tiwari

See https://github.com/libgeos/libgeos/pull/25

git-svn-id: http://svn.osgeo.org/geos/trunk@3951 5242fede-7e19-0410-aef8-94bd7d2200fb
Remove unneeded include

git-svn-id: http://svn.osgeo.org/geos/trunk@3952 5242fede-7e19-0410-aef8-94bd7d2200fb
capi Voronoi Diagram Builder + tests

git-svn-id: http://svn.osgeo.org/geos/trunk@3953 5242fede-7e19-0410-aef8-94bd7d2200fb
Rename CAPI method GEOSVoronoiDiagramBuilder to GEOSVoronoiDiagram

See #627

git-svn-id: http://svn.osgeo.org/geos/trunk@3954 5242fede-7e19-0410-aef8-94bd7d2200fb
Cleanup VoronoiDiagramBuilder interface, add NEWS item (#627)

Cleanups involved removing all explicit "delete" calls trough
auto_ptr uses, moving some allocations from heap to stack and
reducing object copies.

git-svn-id: http://svn.osgeo.org/geos/trunk@3955 5242fede-7e19-0410-aef8-94bd7d2200fb