please add support to MSSQL driver

[liao0007]

Hi there,

according to the wiki, com.microsoft.sqlserver.jdbc.SQLServerDriver is supported

MSSQL
Download the MSSQL driver and add the dependency manually.
Database Settings:
driver = com.microsoft.sqlserver.jdbc.SQLServerDriver
jdbcurl = jdbc:sqlserver://:;DatabaseName=

however, it's not listed in ActiveRecordConfig.scala adapter method and will through a exception

Caused by: com.github.aselab.activerecord.ActiveRecordException: Unsupported database driver: com.microsoft.sqlserver.jdbc.SQLServerDriver

Please help to fix this for V0.4

Thank you!