ffmpeg: Bump to 2.2-Helix-alpha2 - rebased on 2.2.4
[webinterface.default] Sort audio tracks by track number
Merge pull request #4945 from fritsch/ffmpeg-2.2-helix-alpha2

ffmpeg: Bump to 2.2-Helix-alpha2 - rebased on 2.2.4
[win32] Win32SMBDirectory: fix network enumeration on Win8.1 Update 1
Thanks @Voyager1 for report
Merge pull request #4942 from t0xicCode/patch-1

[webinterface.default] Sort audio tracks by track number
fix potential floating point exception when converting NaN to int. Thanks to @bkuhls
fixed: quell warning

incrementing a bool is deprecated
fixed: undefined behavior in karaokelyricstextkar
[tests] fixed URIUtils tests
[stdstring] get rid of CStdString from utils/ (part 1)
[stdstring] get rid of CStdString in dbwrappers/
[stdstring] get rid of CStdString in playlists/
[stdstring] get rid of CStdString in view/
[stdstring] get rid of CStdString in network/
[stdstring] get rid of CStdString in filesystem/*File.cpp|h
[stdstring] get rid of CStdString in filesystem/*Directory.cpp|h
[stdstring] get rid of CStdString in filesystem/(Music|Video)DatabaseDirectory/
[stdstring] get rid of CStdString in filesystem/
[stdstring] get rid of CStdString in dialogs/
[stdstring] get rid of CStdString in addons/