Release version 0.9.0 (bazelbuild#944)

Release `v0.8.0` (bazelbuild#892)

More quoting fixes for handling paths with spaces (bazelbuild#850)

Release `v0.7.0` (bazelbuild#827)

Release 0.6.0 (bazelbuild#784)

Release 0.5.1 (bazelbuild#747)

Release 0.5.0 (bazelbuild#740)

Docs are now auto-generated using mdbook (bazelbuild#692)

set write permission on boost_build for INSTALL_DIR (bazelbuild#653)

Co-authored-by: James Sharpe <[email protected]>

Enabled error checking in the built_tools framework (bazelbuild#574)