schema 2.0 to 2.2 upgrade

quartz database schema has been upgraded since 2.2 to include one
additional column (SCHED_TIME) in QRTZ_FIRED_TRIGGERS table. For more
details see:
https://github.com/quartznet/quartznet/blob/master/database/schema_20_to_22_upgrade.sql.
fixed indentation in some of the .sql files
Merge pull request #24 from ozren1983/master

Database schema updates for quartz 2.2