Added webhook notifications to TravisCI build.

Install Linux icon in hicolor instead of pixmaps

Fix typo for dependent options

hicolor is the preferred location for applications. See https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html#directory_layout

Same as https://github.com/citra-emu/citra/pull/3007

time: Implement ISteadyClock::GetCurrentTimePoint

Improve IPC, unify Domains and Sessions, and add validation

* Updated the audout:u and IAudioOut, now it might work with RetroArch without trigger an assert, however it's not the ideal implementation

* Updated the audout:u and IAudioOut, now it might work with RetroArch without trigger an assert, however it's not the ideal implementation

* audout:u OpenAudioOut implementation and IAudioOut cmd 1,2,3,4,5 implementation

* using an enum for audio_out_state as well as changing its initialize to member initializer list

* Minor fixes, added Service_Audio for LOG_*, changed PcmFormat enum to EnumClass

* Minor fixes, added Service_Audio for LOG_*, changed PcmFormat enum to EnumClass

* added missing Audio loggin subclass, minor fixes, clang comment breakline

* Solving backend logging conflict

* minor fix

* Fixed duplicated Service NVDRV in backend.cpp, my bad

Fix time returning epoch time in milliseconds rather than in seconds

logging: add missing NVDRV subclass to macro list

Correct Spelling

IPC: Don't create unnecessary ports when returning sub interfaces.

 AppletOE: Stubbed CreateManagedDisplayLayer to create a new layer in the default display.

Stub OpenAudioOut and fix a issue with HID IAppletResource

This function is used by libnx to obtain a new layer.

It'll be needed when we implement CreateManagedDisplayLayer.

It is now created during Service initialization and passed to all the services that need it.

VI: Move BufferQueue and NVFlinger to their own folder/namespace.