v2.10.2 session management release

Major changes this release:

• enhanced session security #178

NOTE: Cookies are now required for authentication. Users who do not have cookies enabled will receive a message from the application informing them they must enable cookies to login.

This release also includes the following v2.10.1 hotfixes:

• promote the playable track feature by advertising playable albums #172
• hide Google drive shares for non-authenticated users #175
• fix styling problems in playable track display #177
• fix several regressions introduced in v2.10.1 (5b80a48, e91dc73, 679013a)