Upgrade nan to fix clang linking problem lovell#259

Update changelog for v0.11.1

Version bumps for benchmark test

Version bumps ahead of v0.11.0

Version bumps ahead of v0.10.1

Dependency version bumps ahead of v0.10.0

Remove confusing CSS equivs introduced in 77bbbb9

Add assumeyes flag for Fedora lovell#167

Tighten 'extract' parameter validation lovell#158

Update libmagick references to the C library