Changes from 3.0.0-rc2 to 3.0.0

• Fixes an integer overflow in VL-block decompression where cumulative
  blocknbytes was tracked in a 32-bit integer. PR #753. Thanks to @metsw24-max.

• Fix data races in global configuration APIs using mutex protection. PR #753.
  Thanks to @metsw24-max.

• Different typos fixed. Thanks to @DimitriPapadopoulos.