Replace Fancy Class snippet

This snippet was a pain to maintain because UltiSnips does not generate
readable error messages. Additionally, I found that I don't really know
the information required by the snippet until I start writing the class.
So, I'll retire this one and go back to the simpler version.
Fixup show variable snippet
Upgrade UltiSnips
Winmove mappings do not open new windows

Previously, pressing <C-l> would call Winmove('l') which would open a
new window if one was at the edge of the screen already. I've decided
that I don't like this because it doesn't work effectively for vertical
splits when tagbar and nerdtree are open. Thus, I'm going to go back to
good old fashioned <C-w>s and v for window splits and not have to worry
about accidentally opening window splits with <C-l> and <C-h>, etc.