Some cmake-related fixes for hypertable, sigar and moses
Removed benign warnings about uninitialised variables
Removed a host of warnings mostly about sign comparation - Issue #261
Removed deprecation warnings in gtk-visualizer - Issue #261
Removed unused variables,results  warnings - Issue #260 and #261
Merge pull request #263 from TNick/remove-warnings

Remove warnings

Looks great, thanks!
Merge pull request #259 from TNick/cmake-fixes

Some cmake-related fixes for hypertable, sigar and moses