* Add documentation * Justification u8a decoding and json encoding (#146) * Decode Justifications * Json encoding for justifications * Bump deps * Allow extrinsic length encoding to operate on u8a[] (#148) * Fix config and move generated doc to a subfolder * Cleanup extrinsic encoding (#150) * Cleanup extrinsic encoding * Removed now-defunct type * Add uncheckedLength encoding * Add examples * Ignore package-lock since we use yarn * Cleanup examples * Add gitbook config and some base files for the doc * Do not make full doc mandatory for now * Add contributing guide, polish doc and samples * Update the deps of all samples and add yarn scripts Fix and regenerate the doc * Fix Contributing guide