Starfield fix and Milky Way

Fixed bug where more stars were generated at the poles.

Added 'Milky Way' band in sky, customisable with MILKY_WAY_WIDTH,
MILKY_WAY_INCLINATION and MILKY_WAY_RATIO consts in Generator.cpp.
fix Voxel Server Protocol menu options to work again
fix voxels as points menu to work correctly on startup
improve behavior of too more than _maxVoxels
improve voxel server's behavior when client is moving, dump out of view pending voxels
added abandoned voxels to stats, improved sizing behavior of voxel stats dialog
if LOD changes than don't consider WasInView on server
Merge pull request #1151 from ey6es/master

If the skeleton has meshes, don't render the balls and sticks.
Merge branch 'master' of https://github.com/worklist/hifi into bugfixes

Conflicts:
	libraries/voxel-server-library/src/VoxelSendThread.cpp
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Merge pull request #1150 from ZappoMan/bugfixes

Several Bug Fixes and Improvements
add debug to see document root on DS relaunch
Merge pull request #1152 from birarda/assignment

add debug for DS document root
fix a broken build in the domain-server
Merge pull request #1153 from birarda/assignment

fix a broken domain-server build
Merge pull request #1142 from lordwaym/starfield-fix

Starfield fix and Milky Way
update to latest civetweb from source
create a copy of document root string
Merge pull request #1155 from birarda/assignment

update to latest civetweb from source