Introduce restore and minimize animations

[davidzech]

Achieves this by avoiding usage of WindowStyle None unless one or more of these options are true:
UseNoneWindowStyle
IgnoreTaskBarOnMaximize

If either of these are true, Minimize/Restore animations are disabled. It simply isn't compatible with WindowStyleNone.

GlowWindows are restored after 200ms of window being restored, like VS2013 does.

An IgnoreTaskBarOnMaximize toggle has been added to the MetroDemo, which offsers to serve a quick way to both toggle this flag and minimize/restore animations.

[mrahhal]

@AdditionalPylons a git reset 8c589a86076bf8196b8fadfce1dbb81619374be5 followed by a git commit -m "Fix null access when glowwindows are null" would clean the history (would keep the first commit as it is, and squash the 3rd and the 4th commit with the 2nd). This benefits the master branch when merged.

If in doubt you can try it with a new branch. Just make sure that you're in a clean working directory.

[davidzech]

Ok, thanks for the tip.

[flagbug]

Looks good, thanks!