* consistent spelling and capitalization of RunLength, TileID, MVT; wording [#107]
* Spec v.2 changelog; remove sections to be discussed later [#107]
* copy corrections by @DerZade [#235]
* docs(spec): detailed rewrite of V3 specification by @DerZade [#107]
* spec bump to v3.2
* includes pseudocode and diagrams for binary layout
* adopt RFC 2119 specification language