Rename files with spaces in names.

[fiatflux]

These filenames are technically allowed, but aren't that fun.

[Jaxkr]

Does this break any imports?

[fiatflux]

Not in this repository ;-)

% cd <path_to_git_client>
% find . -type f | xargs -i grep "messages.dat reader"
% find . -type f | xargs -i grep "api client"
%

These files are very primitive anyway... I wouldn't ever want someone to
wrap those files in something else at this point. They are the beginning of
useful utilities though!