Avoid insertion of extra newlines when adding comments

Merged in upstream jsoncpp in pull request

https://github.com/open-source-parsers/jsoncpp/pull/52

Change-Id: Iae13e992765362399b23294b153c3ae1424704c0
FIX: Reset clipping planes

This fixes the issue where the clipping plane is still
active after the camera dollies out of the volume. The
check looks at whether the camera was inside the volume
in the last frame and if the geometry needs to be updated.

Change-Id: Idfc6a87f57ec623044d247c49703d45fc2e47f3f
BUG: Added missing build of lookup table

This fixes some uninitialized value complaints by valgrind.

Change-Id: I9298b18022049daecf5ab4871440c6953da2f02a
cmake: fix CMP0054 warnings

Change-Id: I0bbaedd2b060f45b6cb5230913e9485925c9f081
cmake: remove variable dereferences in if statements

Change-Id: I3af0b1abbbf770524a4e044ed85d68f32eddf679
Merge topic 'cmake-cmp0054-warnings' into master

5a8610c3 cmake: remove variable dereferences in if statements
900f8516 cmake: fix CMP0054 warnings
Merge topic 'jsoncpp_comment_adding' into master

371f18ad Avoid insertion of extra newlines when adding comments
Merge topic 'test_actor2d_valgrind' into master

b3b0536a BUG: Added missing build of lookup table
Merge topic 'fix_clipping_issue' into master

723ef371 FIX: Reset clipping planes