Initial take at plugin dialog
Merge branch 'master' into plugindownload
More download stuff
More plugin stuff
vcproj update: enable multithread build
Some more UI stuff.
PluginScreen progress
Merge branch 'master' into plugindownload

Conflicts:
	Core/Core.vcxproj
	Windows/PPSSPP.vcxproj
	native
More tweaks to pluginscreen
Re-enable atrac3+ mono audio
Fixed a crash point in the memory viewer (if the symbol map doesn't find
the value).
Merge pull request #2071 from doggydogworld/master

Fixed a crash point in the memory viewer (if the symbol map doesn't find the value).
Merge pull request #2068 from raven02/patch-3

Re-enable atrac3+ mono audio
Merge pull request #2070 from thedax/sceNetStubs

Implement multiple stubs for sceNet*
Update native. Buildfix.
More improvement for mpeg pts.

The mpeglastTimeStamp is probably wrong in some videos. So a video is
end only if there is no more data for decoding.
Merge pull request #2081 from oioitff/mpeg-fix

More improvement for mpeg pts.
Add ffmpeg logs for MediaEngine in debug mode
Merge pull request #2082 from oioitff/mpeg-fix

Add ffmpeg logs for MediaEngine in debug mode
Upgrade the bundled zlib