Use setlocal for all buffer variable settings
Add recursive expansion of variable children

This applies to pointers, arrays, structs, etc.  Expand to a depth of 6
levels (just to avoid recursive definitions exploding out of all
proportion), indenting each line so that users can make use of vim's
native folding capabilities if they wish.
Add custom fold for debugger panes
Disable display of static variables in local pane by default

With static variable display enabled, the number of variables displayed
is huge, especially once you start expanding children.  Disabling them
seems like a better default, though as the comment says it would be nice
to be able to toggle display if you wish.
Merge pull request #1 from dpwright/local-variable-expansion

Local variable expansion