Fix sign vs unsigned comparison warnings.

Change-Id: Id651c6bad3270bd29830ae42b4bb486766469cbb
Fix warnings about unused method parameters.

Change-Id: Ica6275dc55e69798068b63ee8177aacc56ae7c2d
Remove unneeded qt resources from the QtExample.

Change-Id: Ic98f55c9e099dabb8cf470a5b6cee79d2663a4bc
Merge pull request #36 from robertmaynard/fix_warnings

Fix warnings