v2.1.5

Updates to key features and stability improvements.

This release is under the 2.1 release, which updated CodeIgniter, which requires special care when updating Scalar from versions before 2.1. See UPDATE.txt for more information. If you are installing Scalar from scratch, you can ignore this.

See changes to the database and config files here:
https://github.com/anvc/scalar/wiki/Changes-to-config-files-over-time

Note that the Transfer Tool is kept in a separate repository: https://github.com/Michael628/scalar-book-transfer-tool ... to use, download and place the unzipped files into /system/application/plugins/transfer