Add a from_str function that calls out to the associated method on the trait
Add from_str docs
Remove the __log function for __log_level

Also redefine all of the standard logging macros to use more rust code instead
of custom LLVM translation code. This makes them a bit easier to understand, but
also more flexibile for future types of logging.

Additionally, this commit removes the LogType language item in preparation for
changing how logging is performed.
std::rt: Some I/O cleanup
std::rt: Add libuv bindings for getaddrinfo
std::rt: Add get_host_addresses function

This is a very simplistic method for host name resolution. It converts
a host name to a vector of IP addresses. Should be enough to get started.
std: Remove push_fast from OwnedVector. Closes #8769

This is an unsafe implementation detail of `push`.
Generate random BigUints and BigInts
Fix glitches with struct field aligned indents
test the correct function (oops)
Convert between BigInts and BigUints
Indent correctly after opening square bracket
Allow indenting to align struct fields after curly brace
Indent return type to align with arguments
Add custom group for rust-mode
Add paragraph fill and auto-fill for multi-line comments
Add ERT tests
std::rt: Fix addrinfo definition on BSD
Add fractional second support to str{p,f}time

The ISO 8601 standard does not mandate any specific precision for
fractional seconds, so this accepts input of any length, ignoring the
part after the nanoseconds place. It may be more correct to round with
the tenths of nanoseconds digit, but then we'd have to deal with
carrying the round through the entire Tm struct (e.g. for a time like
Dec 31 11:59.999999999999).

%f is the format specifier that Python's datetime library uses for
0-padded microseconds so it seemed appropriate here.

cc #2350
Fixed makefile to point to the new llvm build directory.