Document std.stream.FileMode enum

[ghost]

This pull request documents the std.stream.FileMode enum that is thoroughly used in the [std.stream](http://dlang.org/phobos/std_stream.html module, but is not visible in the html page.

Although std.stream will be revamped/rewritten in D2, in D1 is still in use, so I think that is valid to make pull request for the old version. Moreover if there's no definitive date for the new stream version.

This partially fixes the issue 1726: std.stream FileMode documentation problems.

[ghost]

Curses! the first commit f107338 shouldn't have been pulled. Do I close this pull and retry?

[yebblies]

Just do:

git checkout -b newbranch
git rebase -i master

(remove the line that corresponds to the commit you don't want any more)

git push origin newbranch::std-stream-filemode-docs

[ghost]

Sigh.

error: failed to push some refs to 'git@github.com:YaoGomez/phobos.git' To prevent you from losing history, non-fast-forward updates were rejected Merge the remote changes (e.g. 'git pull') before pushing again.

I don't know what happened. I always do another branch for each independent pull.

[yebblies]

Oops, that was my mistake, it just doesn't like pushing after you rebase.

Use git push origin newbranch::std-stream-filemode-docs -f to make it do it anyway.

[ghost]

Nope. Now I'm getting some local errors. I'm going to close this and check what's going on. Thanks for the help anyways.