Replace re.search with string.find
Reduce buffer size to 4096
Fast paths for timeout
Fastpath2. Minor optimizations
Remove double call to settimeout_raw.  This is set via property update.  See timeout_change.
Fix syntax error and some of the tests
Fix doctest so it can be copy-pasted
Fix regression which causes infinite loop
tighter code in `pwnlib.tubes.tube.recvuntil()`
Merge pull request #248 from zachriggle/tube-recvuntil-str-find-bufsize-fastpath2

Improve tube performance. Fixes #238