Merge pull request #44 from soltanmm-google/meta_meta-meta-MUSHROOM-MUSHROOM-Snaaaaakkeeeee-oohhhh-it's-a-snaaaaakkeeeeee

Paper-over Python errors

Use grpc_slice at core boudary

This reads directly off of the slices rather than ref'ing and unref'ing
them. There's likely some silliness w.r.t. interned slices and
references to them outliving their associated call objects, but we are
just ignoring that for now.

calls/channels

Use it to ensure we don't delete the call from that thread: doing so
would create a cycle that's kind of bad.

Drop support for Node 0.12 and io.js 1.0

PHP: use a macro to specify extension src dir

added ability to run bad-server http2 tests

Fix RST_STREAM(0) inconsistency

Update negative-http2-interop-test-descriptions.md

sending cpu load latency performance test results to big query

configurable channel args for performance benchmarking

Remove unused load

Promote dns resolution failure message to INFO

Add missing include for GPRAPI

Add missing include for size_t

Add perf link

Add HTTP/2 interop test client

Known failures: https://github.com/grpc/grpc/issues/8629 

PHP: attempt to fix mem leaks

manual revert of #8901