Updated README with new installation instructions

Bumped podspec to 2.1.3

Updated podspec with minor 2.1.2

Bumped podspec to 2.1.0.

Merge pull request alikaragoz#53 from alikaragoz/dev

Merge of changes made in dev branch.

Bumped tag version in podspec file.

Tag release 1.1.1

Tag release 1.1.0

Tag release 1.0.1

Tag release 1.0.0