Bugfixes and minor http server feature.

[IPMegladon]

• File size check for https://github.com/sensepost/objection/issues/554
• Modified device.attach to fix https://github.com/sensepost/objection/issues/694
• Fixed http server issues introduced by https://github.com/sensepost/objection/commit/3f9763bfd4179ecb20db18934430e30176cc650f (me)
• Added support for using "../" (previously this would mess with current directory display.)
• Add quotes when file/folder has space to fix https://github.com/sensepost/objection/issues/195
• Recursive directory support for http server. Previously you could not traverse directories.