Bug fix.
bugfix for sourcing the syntastic class files

Fixes #543.

Use `runtime!` to source all runtime files - not just the first one
found. I actually dont know how syntastic was working at all without
this...
Merge remote-tracking branch 'lcd047/vcol'
extract the vim work around code out to be more explicit

Add an explaining variable and a comment for the vcol workaround. See
issue #588