adjust the intra md under scc
Parameterize the project name and change it to openh264
Merge pull request #778 from ethanhugg/rename

Parameterize the project name and change it to openh264
Add IntraSad asm code.

Enable intraSad ASM code

Refine format

Add X86_ASM pretect for intraSad ASM code UT

remove duplicated code.
Merge pull request #761 from sijchen/md_merge31

[Encoder MD] Adjust MD under Screen Content route
refine format
add scrolling skip function pointers in MD
Merge pull request #780 from sijchen/md_merge25

[Encoder MD] Add scrolling skip function pointers in MD
Merge pull request #779 from zhilwang/intraSad

Add IntraSad asm code.