making some type casts abide by coding standard
HeadData::_yaw and friends change to _baseYaw
merge upstream/master into enforce-standard

Conflicts:
	interface/src/avatar/Hand.cpp
getTweakedOrientation() to getFinalOrientation()
PitchTweak and friends become DeltaPitch
update a comment
splitting lean input from lean perturbations
Don't render display name/chat message for own avatar in first person mode.
Use a spherical estimate of the shadowed region to avoid growing and shrinking
it as we turn around.  Also, might as well render shadows for the billboards.
Merge pull request #2561 from ey6es/master

Don't render display name for own avatar in first person mode, use a spherical model for the shadow volume to prevent growing and shrinking.
Merge pull request #2538 from AndrewMeadows/enforce-standard

making some type casts abide by coding standard
Merge pull request #2549 from AndrewMeadows/avatar-interaction

name changes to get rid of "tweaked" angles in Head code
Merge pull request #2559 from AndrewMeadows/avatar-interaction-2

split lean input from lean perturbations
Moved user names in the char 1 pixel to the bottom.
Enabled going to the clicked user in the chat.
Gave more space to the user in sent messages so that resizing of the
column for messages occurs for really long user names.
Highlighted the user's own chat messages.
Changed the dock widget for the chat so that it replicates the agreed
upon design.
Changed the highlighting of own messages to occupy the whole row.
Put the chat window above the 3D view and animated its showing.