puts private members to the bottom of the class definition
adds comments and blank lines to clarify the code
Merge branch 'master' of git://github.com/worklist/hifi into 19165

Conflicts:
	interface/src/Oscilloscope.cpp
refactor the Head class to remove _sphere and use default copy constructor
remove unused GLUQuadric sphere from Avatar class
use the default Avatar destructor, comment out unused consts in Head
change the iris texture
fix the width and height for the new iris texture
repair indentation in Head constructor
remove a lingering comment
Merge pull request #338 from birarda/avatar-refactor

refactor the Head class to not keep its sphere and use default copy constructor
disallow Agent copying
disallow copying of AvatarData objects
disallow copying of Avatar objects
inline getters and setters in AvatarData
inline getters and setters in Avatar
disallow copying for AudioRingBuffer objects
disallow copying of VoxelAgentData objects
fix eve's use of the now disallowed copy constructor
disallow copying of VoxelSystem objects