Remove hifi screenshare (updated)

[daleglass]

PR #435, rebased.

Original text below:

Cherry-picked and updated from Tivoli dd5b6ea6ee5597a06603e16509640e7ed18106bb

As much of a hoarder as I am, I really don't think we will ever make use of this screen share app. The way it is currently supposed to work isn't any better than a regular web browser, and I don't think we will ever modify WebRTC to make it any better than a web browser.

This includes a placeholder to not break protocol.
Tested on Linux.

Closes #435

[daleglass]

@HifiExperiments I incorporated your review comments into the last commit, please take a look!

[ksuprynowicz]

Windows build is failing for me with an unrecognized symbol:

image.lib(OpenEXRReader.obj) : error LNK2001: nierozpoznany symbol zewnętrzny imath_half_to_float_table [C:\Users\ksupr\source\overte\overte_v8\cmake-build-relwithdebinfo-visual-studio\plugins\openvr\openvr.vcxproj]
C:\Users\ksupr\source\overte\overte_v8\cmake-build-relwithdebinfo-visual-studio\plugins\openvr\RelWithDebInfo\openvr.dll : fatal error LNK1120: liczba nierozpoznanych elementów zewnętrznych: 1 

[daleglass]

Windows build is failing for me with an unrecognized symbol:

image.lib(OpenEXRReader.obj) : error LNK2001: nierozpoznany symbol zewnętrzny imath_half_to_float_table [C:\Users\ksupr\source\overte\overte_v8\cmake-build-relwithdebinfo-visual-studio\plugins\openvr\openvr.vcxproj]
C:\Users\ksupr\source\overte\overte_v8\cmake-build-relwithdebinfo-visual-studio\plugins\openvr\RelWithDebInfo\openvr.dll : fatal error LNK1120: liczba nierozpoznanych elementów zewnętrznych: 1 

That was fixed in PR #756

Just rebased it on top of the latest code, that should do it. Sorry about that ^_^;;

[ksuprynowicz]

Interface builds now :)

[HifiExperiments]

I would suggest undoing the changes in the following files and moving them to a separate PR against the protocol_changes branch:

• EntityItemProperties.cpp/.h
• EntityPropertyFlags.h (just delete the prop entirely)
• ZoneEntityItem.cpp/.h (remove the ignoreUint32 thing)
• PacketHeaders.h (no need to rename the old version, just add a new version at the end)

with the ignoreUint32 hack, this might not crash, but it's not worth the complexity/risk imo.

[HifiExperiments]

hope you don't mind but I took the opportunity to rebase this once again and really remove the property and bump the protocol (on the protocol_changes branch): #1165