fix(tagsInput): Fix has-success, has-warning and has-error classes

Fix Bootstrap validation classes by removing their dependency on the
has-feedback class.
chore(grunt): Add build folder to NPM tarball
chore(release): Bump version to 2.1.1
chore(release): Release v2.1.1
chore(README): Fix header styling
docs(tagsInput): Fix type option documentation [skip ci]
docs(README): Fix link to the API documentation page
chore(package.json): Add main property
chore(release): Bump version to 2.2.0
Add support for l20n

Allow translating messages like "Start typing...".
Bump version: x.y.z -> (x+100).y.z & remove shrinkwrap