Updated README to express the support of custom collate functions.

Set version to 1.4.0.

Set version to 1.3.2.

Set to version 1.3.1.

Set version to 1.3.0

Set version to 1.2.4

Set version to 1.2.3

Set version to 1.2.2

Set version to 1.2.1

Set version to 1.2.0.{build}.