Release v5.0-a2, 5.0 alpha2, v5.0.112, 161233 lines.

Release v5.0-a1, 5.0 alpha1, v5.0.100, 160817 lines.

Release v5.0-a0, 5.0 alpha0, v5.0.98, 159813 lines.

Release v4.0-r4, 4.0 release4, v4.0.268, 145482 lines.

Refine 4.0 release workflow.

Release v4.0-r2, 4.0 release2, v4.0.257, 144890 lines.

Update SRS image for r.ossrs.net

Disable all asm for FFmpeg, to compatible with ARM CPU.

Release v4.0-b10, 4.0 beta10, v4.0.251, 144665 lines.

Fix warnings for uuid. v4.0.245