Merge branch 'release/0.5.2'
Merge branch 'release/0.6.0'
Merge branch 'release/0.6.1'
not changing Vertex#modify url based on input data, using id instead
version bump + changelog update
Merge branch 'release/0.6.2'
Merge tag 'v0.6.2' into dev

v0.6.2 release
 * Changing behavior for `Vertex#modify()` (URL now determined via presence/absence of `id`, not the passed `data`)