changes for 2.6.0


git-svn-id: http://protobuf.googlecode.com/svn@562 630680e5-0e50-0410-840e-4b1c322b438d
add python/google/protobuf/pyext/__init__.py


git-svn-id: http://protobuf.googlecode.com/svn@563 630680e5-0e50-0410-840e-4b1c322b438d
2.6.0


git-svn-id: http://protobuf.googlecode.com/svn@564 630680e5-0e50-0410-840e-4b1c322b438d
2.6.0


git-svn-id: http://protobuf.googlecode.com/svn@565 630680e5-0e50-0410-840e-4b1c322b438d
copy gtest


git-svn-id: http://protobuf.googlecode.com/svn@566 630680e5-0e50-0410-840e-4b1c322b438d
use a stable gtest for tags/2.6.0


git-svn-id: http://protobuf.googlecode.com/svn@567 630680e5-0e50-0410-840e-4b1c322b438d
add a TODO in reflection_test.py


git-svn-id: http://protobuf.googlecode.com/svn@568 630680e5-0e50-0410-840e-4b1c322b438d
change 2.6.0rc1 to 2.6.0


git-svn-id: http://protobuf.googlecode.com/svn@569 630680e5-0e50-0410-840e-4b1c322b438d
add 2.6.0 tar/zip files to rc/


git-svn-id: http://protobuf.googlecode.com/svn@570 630680e5-0e50-0410-840e-4b1c322b438d
patch Issue 130740043: [MIPS64] Add support for MIPS64 in protobuf


git-svn-id: http://protobuf.googlecode.com/svn@571 630680e5-0e50-0410-840e-4b1c322b438d
update 2.6.0 tar and zip under rc/


git-svn-id: http://protobuf.googlecode.com/svn@572 630680e5-0e50-0410-840e-4b1c322b438d
patch Issue 130740043 to trunk for other atomicops patches: [MIPS64] Add support for MIPS64 in protobuf


git-svn-id: http://protobuf.googlecode.com/svn@573 630680e5-0e50-0410-840e-4b1c322b438d