adjust the intra md under scc
Don't build all object files with -ZW, only the one that needs it

This reduces the build time from 69 s to 30 s, reduces the size of
the built wels.lib from 30 MB to 3.9 MB, and reduces the number of
warnings when building wels.lib.
Only use the -Gm option in desktop debug MSVC builds

This option conflicts with -ZW which is used in Windows Phone builds.
fix new sequence&EC order, and prefix parse bug
fix typedef re-define issue
Merge pull request #772 from lyao2/scrollingUT

this only solve the problem temporarily. but for the building of tests working, merge this first. 
we need to re-consider the including of typedef headers
Merge pull request #771 from huili2/newseqorder_prefixerror_bugfix

fix new sequence&EC order, and prefix parse bug
Merge pull request #766 from mstorsjo/reduce-msvc-runtime-flags

Don't build all object files with -ZW, only the one that needs it
Merge pull request #767 from mstorsjo/avoid-conflicting-msvc-options

Only use the -Gm option in desktop debug MSVC builds
Add a stub makefile target for binaries

This avoids the following error when doing "make OS=ios" if gtest
isn't installed:

make: *** No rule to make target `binaries', needed by `all'.  Stop.

This fixes issue #752.
Merge pull request #775 from mstorsjo/stub-binaries-target

Add a stub makefile target for binaries
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.
Don't compare a boolean to an integer

This avoids a warning when building with MSVC.