This reverts commit 79759fea, reversing
changes made to dc36f4df.

With this change yapf_code no longer changes the code under test when
executed from within the sanity tests.

This should have been included in 1a967c31.

This reverts commit 5e01e2ac.

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.

-) Basic workspace
-) Basic BUILD file with macros

.idea folder is where Project settings are stored with each specific
project as a set of xml files.

Moves all tests into a separate package. This does not change existing
supported means of running tests (e.g. through run_tests.py).

On Mac and Windows, the default directory name conflicts with the BUILD
file we have.

Current latency profiles have their tails dominated by writing latency
logs, which is hugely undesirable.

Now when a thread log fills up, push it to a background thread to write
to disk. At shutdown, wait for all latency traces to be flushed.

It was causing git to ignore everything within src/core