Fixed OTP registration when set to mandatory

Fixed user session isn't invalidated before OTP registered when OPT is set to mandatory in properties. Fixes bastillion-io#102

Updated version

Set version. Update dependencies.

Updated project dependencies

Updated project dependencies. Java JDK 8 or greater now required.

Updated version

Updated version

Bumped version

Merge branch 'development'

Conflicts:
	src/main/webapp/admin/secure_shell.jsp

Updated version

Upgraded jetty to latest version (9.2.9.v20150224) due to JetLeak Vul…

…nerability: Remote Leakage of Shared Buffers in Jetty Web Server [CVE-2015-2080]. Also, updated google zxing.