Version 0.10.0

This version includes:

• This release fixes serious implementation bugs, the dependent was dropped after the owner, and panics in drop impl could lead to double free. As consequence I've yanked all previous versions. In addition a series of potential unsound usage bugs have been addressed. Please update to v0.10 as soon as possible. See #18 #20 #24 #26 and #28 and their associated PRs #21 #23 #25 #27 #29. Huge thanks to @steffahn for reporting and helping fix these issues.

• An improved Debug implementation that uses fmt.debug_struct and now correctly supports custom format strings such as {:#?}. See #22