Merge pull request #8 from kolektiv/develop

New map functions and idLens
ver bump
Merge branch 'release/4.1.0' into develop
Merge pull request #9 from kolektiv/develop

Removing mapL
ver bump
Merge branch 'release/4.1.1' into develop
slight tidying of source, arg order changed for infix operators for get, set, etc.
-x