ensure HAVE_SIXENSE is defined to define _sixenseLibrary
Add attenuation setting on DS page
Changed attenuation setting help
Removed debug
Merge pull request #3514 from birarda/hydra-crash

fix for debug build without sixense library
Merge pull request #3515 from Atlante45/attenuation_setting

Attenuation setting
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels