cast to uint32_t in GET_WORD to prevent possible left shift error.
Merge pull request #343 from huili2/cast_get_word

cast to uint32_t in GET_WORD to prevent possible left shift error.
refine level check
Merge pull request #344 from licaiguo/fix-level-check

refine level check
fix int conversion warning, using LD32/ST32
use active SPS parameters instead of other SPS.
Merge pull request #345 from licaiguo/fix-int-conversion-warning

fix int conversion warning, using LD32/ST32
Merge pull request #347 from huili2/active_sps_ref_size

use active SPS parameters instead of other SPS.
Use -dynamiclib instead of -shared for building shared libraries on OS X

Older toolchains don't recognize the -shared parameter.
Add the necessary directories to the include path within xcode

This is not necessary when using precompiled headers.
Remove unnecessary precompiled headers

This reduces the huge amount of near-useless small extra files
scattered around for the sake of the platform demo projects.

This requires explicitly listing all the ncessary include paths.
Merge pull request #348 from mstorsjo/darwin-dylib

Use -dynamiclib instead of -shared for building shared libraries on OS X
Add an SHA1 implementation by Paul Jones
Make the SHA1 header compatible with C++
Make the SHA1Result function write the output into a byte array
Use the bundled sha1 implementation instead of relying on openssl

This simplifies running tests on platforms where OpenSSL isn't
commonly available.
Use the local sha1 function names directly without compatibility defines
Remove the now unused -Wno-deprecated-declarations on OS X

This was only required for building with OpenSSL.
Set GTEST_HAS_TR1_TUPLE to 0 on msvc

This fixes building of gtest on msvc.

See e.g. http://stackoverflow.com/questions/8274588 for
more discussion on the matter.

This is only required on MSVC 2012 - gtest itself (in the cmake
files) adds -D_VARIADIC_MAX=10 to the build when building using
MSVC 2012, but we don't know the MSVC version at the make stage
here. Since the gtest tuple support isn't used at all, it's
simpler to just disable it altogether than to try to add
-D_VARIADIC_MAX=10.
Wrap the library names in codec_unittest LDFLAGS, for use with MSVC