Bumping source package revision (1.2.1) and updating release notes

Bumping source package revision (1.2.1) and updating release notes

Bumping source package revision (1.2.1) and updating release notes

Exlcuding portable binaries from morelinq package

Pegging min versions of main source package dependencies

Pegging min versions of main source package dependencies

Pegging min versions of main source package dependencies

Pegging min versions of main source package dependencies

Fixes issue morelinq#91 (typo in DistinctBy doc)

Fixes issue morelinq#90