properly wrap XMPP stuff with "#ifdef HAVE_XMPP"
fixed packet sequence number rollover
maintenance: replace implicit casts with explicit
use START_LOCATION as default settings
fix copy-n-paste typo
gravity disabled by default
Fixed orientation and offset issues
Merge branch 'master' of https://github.com/highfidelity/hifi
Merge pull request #2798 from Atlante45/master

EditModels.js
Merge branch 'master' of https://github.com/worklist/hifi into modelserver
Merge pull request #2797 from ey6es/master

Disabled depth determination based on scale for Faceplus, improved attachment edit UI, fix for attachments' not appearing in rear view mirror head mode.
disable environment gravity when not set in menu
make model server not oversend data
Merge pull request #2802 from ey6es/master

Fix for exports from Sketchup.
cleanup old references to node which are really elements
code cleanup for style guide
Update welcome screen
Merge remote-tracking branch 'upstream/master' into 19640
Merge pull request #2794 from AndrewMeadows/thermonuclear

misc maintenance and bug fixes
Slow down hydra move