Fix some keyboard shortcuts for layouts with AltGr
Fix some keyboard shortcuts for layouts with AltGr

In many keyboard layouts, such as German, French and Swedish, some
characters have to be typed using the AltGr key. If such a key is the
non-first key of a VMP keyboard shortcut _sequence,_ the sequence fails
to trigger. This is because Atom receive an 'altgraph' key press
inbetween. For example, the shortcut `g ~` is seen as `g altgraph ~`.
'altgraph' seems to be handled just like any other key, so just like
`g a ~` does not exist, neither does `g altgraph ~`.

This commit duplicates shortcuts containing problematic AltGr keys. For
example, in addition to the `g ~` shortcut I've added `g altgraph ~`.

The keys I did this for are: `~ $ | [ ] { }`.

Fixes #661.

t9md/atom-vim-mode-plus