Fix: auto refresh when a single file was deleted
Ignore temp files.
first version of parent directory header converted to buttons
Add mode for click to change root.

new var: neo-click-changes-root
new fun: neotree-click-changes-root-toggle
new key: C -> neotree-click-changes-root-toggle
simplify neo-path--insert-header-buttonized
Merge branch 'rgiar-feature/buttonized-header' into dev
rich options for header
Integration with Projectile, issue #36.
add melpa badge
Fixes #51 Open file in last active window
Fixes #48 Select Up dir + Down + siblings

Key bindings have been chosen arbitrarily to
U, D, S and s