Merge pull request #49 from mayeut/release-60-support

Add release 60 support

(#30): Add release 58 support

(#5): Set the right arch inside install-sysroot.py argument

(#5): Set the arch inside Package.cmake and install-sysroot.py argument

(#10): State BUILD_TESTS variable inside the README and CHANGELOG

(#10): Add webrtc_tests target to ninja build command

Fix Travis deploy script, prefix the file with ls

Write CHANGELOG.md, release 1.0

Enhance the deployment process through CIs

Build version from current tag

Write windows-related build instructions, stuff about debug mode

(#23): Add sample target, build it and run it

Build webrtc, system_wrappers_default and libjingle_peerconnection

Install CMake target files, from libwebrtc target this time