* config parser now handles quoted values correctly. This doesn't hamper
  multi-line support.
* added regression test to travis to assure we will be warned if we
  rewrite and break the user's .gitconfig file
* only rewrite configuration files if we actually called a mutating
  method on the writer. Previously it would always rewrite it.

Fixes #285

add a GIT_PYTHON_TEST_GIT_DAEMON_PORT to set a port other than 9418,
for example for when you already have a daemon running on that port.

No reason to expose a daemon to all interfaces when it is only used for
tests, which connect to localhost anyway.
I'd love to use localhost here instead, but the git-daemon man page points out:

    If IPv6 is not supported, then --listen=hostname is also not
    supported and --listen must be given an IPv4 address.

I don't know of a way to check if git has ipv6 support, but 127.0.0.1
should be around for the foreseeable future

It expected to see major version 0 though.

The previous patch failed to update the expected number of op_codes,
which would result in an exception when creating an instance of
RemoteProgress. This patch corrects the value to the new expected number
of op_codes (8)

When running a long running operation (such as a clone on a large repo),
Git may return a message indicating that it is 'Finding sources'. Since
there is no bit field value for this message, this causes a large amount
of error messages to be emitted to stderr.

This patch fixes this by adding another bit field value for this
message, FINDING_SOURCES. Derived classes can look for this op_code and
handle it appropriately.

Related to #248

... if it is not found. Previously, especially on windows, this wasn't
explicit.

Fixes #248, affects #126