Merge github.com:grpc/grpc into grpc_slice

.gitmodules

BUILD

CMakeLists.txt

Makefile

binding.gyp

build.yaml

config.m4

gRPC-Core.podspec

grpc.gemspec

package.xml

src/core/ext/lb_policy/grpclb/grpclb.c

src/core/ext/lb_policy/round_robin/round_robin.c

src/core/ext/resolver/dns/native/dns_resolver.c

src/core/lib/channel/compress_filter.c

src/core/lib/iomgr/network_status_tracker.c

src/core/lib/iomgr/resource_quota.c

src/core/lib/iomgr/resource_quota.h

src/core/lib/iomgr/tcp_posix.c

src/core/lib/iomgr/tcp_windows.c

src/core/lib/surface/call.c