Partly add arm asm code to encoder.
Remove .DS_Store file.
Add intra predictor arm asm code.
remove un-supported mgs code
Use the __ARM_NEON__ built-in compiler define for identifying neon capability on iOS

This avoids having to hardcode the names of devices that don't
support neon.

The devices that don't support neon don't run the armv7 variants
of iOS binaries at all - they would need to be built for the armv6
architecture. (Building for armv6 isn't supported at all in
modern iOS SDKs.)

Therefore we can simply use the __ARM_NEON__ built-in compiler
define to check if NEON code is allowed in the current build,
and have the WelsCPUFeatureDetect function return flags accordingly.

The only thing this disallows is doing an armv6 build which would
optionally enable neon code at runtime if run on an armv7 capable
device, but since Apple allows you to build the same binary for
armv7 separately in the same app bundle, and since armv6 building
isn't even possible in the current iOS SDKs, this isn't really a loss.

This is in contrast to the android builds where the armv7 baseline
does not include NEON.
Add arm asm code for processing.
rebase on latest code, refine android build
remove inter-deblock related parameters
modify welsenc.cfg for parameters update
simplify-layer-process
Merge pull request #424 from ruil2/encoder_interface

remove inter-deblock related parameters--review request #148
add new para reading to get accord with the new API design
clean encode cfg files
Merge pull request #423 from licaiguo/refine-android-build-pr

rebase on latest code, refine android build
Merge pull request #428 from sijchen/read_para3

[Encoder Console] add new para reading to get accord with the new API design
Merge pull request #427 from volvet/clean-encode-cfg

clean encode cfg files
Merge pull request #415 from volvet/remove-useless-mgs-code

remove un-supported mgs code
Use a macro for conditionally logging based on ENABLE_TRACE_MT

This avoids having an extra ifdef around every single WelsLog
call.
use stlport to replace libgnuc++, this remove GCCVERSION variable
arm asm code refine.