Use `os.path.splitext` to check file extensions.
Limit blob concurrency
Fix rounding problem in blob concurrency code.
Fixed a bunch of trivial style problems.
Used absolute include paths in incremental_lenses.hpp.
Smothered readdir_r cpplint style warning (rightfully).
Added URL to comment about readdir.
Made coro profiler use stdio, not streams.
Made the coro profiler not use streams.
Disabled a bad whitespace/newline warning (multiple commands on same line) more specifically.
merging #2787 server_test.rb fails on `require` when run outside its directory
merging #2815 update `test/build.mk` to not use external make for drivers
Fixed compilation in gcc 4.9.0, in http_runner.cc instantiation.
Merge branch 'next' into sam_2826
Merge branch 'sam_2826' into next
Merge branch 'sam_2828' into next
Fix bug that caused --fetch all to ignore gperftools

Review 1896 by @larkost
Parallelize on the lowest rather than the highest level in blob traversal
Merge branch 'next' into daniel_2832
Merge pull request #2681 from grandquista/grandquista/Permit_period_in_test_name

Use `os.path.splitext` to check file extensions.