Add Majestic MJ12 Bot a very common seo bot

[summercms]

See github issue: #540 and #100

MJ12Bot

New UA (current):

Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)

MJ12bot

mj12bot

Dead Bots (2007 - 2017)

Mozilla/5.0 (compatible; MJ12bot/v1.4.7; http://mj12bot.com/)
Mozilla/5.0 (compatible; MJ12bot/v1.4.2; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.4.7; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.4.7; http://www.majestic12.co.uk/bot.php? )
Mozilla/5.0 (compatible; MJ12bot/v1.4.1; http://www.majestic12.co.uk/bot.php?+)
MJ12bot/v1.0.5 (http://majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.4.5; http://www.majestic12.co.uk/bot.php+)
Mozilla/5.0 (compatible; MJ12bot/v1.2.4; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.4.7; http://www.majestic12.co.uk/bot.php?+)/Nutch-1.13
Mozilla/5.0 (compatible; MJ12bot/v1.4.3; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.4.6; http://mj12bot.com/)
Mozilla/5.0 (compatible; MJ12bot/v1.4.5; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.4.4 (domain ownership verifier); http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.2.1; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.4.4; http://www.majestic12.co.uk/bot.php?+)
MJ12bot/v1.2.0 (http://majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.4.0; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.3.3; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.3.2; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.3.1; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.2.5; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.3.0; http://www.majestic12.co.uk/bot.php?+)
Mozilla/5.0 (compatible; MJ12bot/v1.2.3; http://www.majestic12.co.uk/bot.php?+)
MJ12bot/v1.2.0 (http://majestic12.co.uk/bot.php?+)

[coveralls]

Coverage increased (+0.02%) to 99.97% when pulling 41f7b8f on ayumi-cloud:Majestic into 880b9fa on WhichBrowser:master.