Use the iMultipleThreadIdc field from SEncParamExt
Use SliceModeEnum as data type for the slice mode fields

This makes the use of the field clearer and safer by allowing
the compiler check that users actually assign proper enum
values.
Set the arch to armv7 by default when building for iOS

Otherwise it would build for the simulator by default, which
in most cases probably isn't what was intended.
Mark pointers as const where possible in vaacalc
Remove unnecessary stray __cdecl annotations in function signature comments in x86 assembly
Remove a stray inline keyword in a function signature comment in x86 assembly

Assembly functions written in external assembly files is obviously
not inlined.
Fix a typo, "heigth" -> "height"
Fix a typo in arm assembly, LORD -> LOAD
fix WELS_READ_VERIFY
Merge pull request #464 from licaiguo/fix-type-wels-read-verify

fix WELS_READ_VERIFY
Merge pull request #461 from mstorsjo/fix-asm-comments

Remove unnecessary/stray keywords in function signature comments in x86 assembly
Merge pull request #459 from mstorsjo/ios-default-arch

Set the arch to armv7 by default when building for iOS
Merge pull request #462 from mstorsjo/fix-typos

Fix two typos in variable and macro names
Merge pull request #452 from mstorsjo/use-slice-mode-enum

Use SliceModeEnum as data type for the slice mode fields
Merge pull request #445 from mstorsjo/use-thread-param

Use the iMultipleThreadIdc field from SEncParamExt
Merge pull request #460 from mstorsjo/add-const

Mark pointers as const where possible in vaacalc