add to LB modifyLoadBalancerAttributes (#871)
change int to Integer (#871)
change boolean to Boolean (#871)
Merge branch 'develop' into issue-871

Conflicts:
	src/main/java/org/dasein/cloud/network/LoadBalancerSupport.java
append options  of attributes (#871)
Merge branch 'develop' into issue-871
Add 'idleConnectionTimeout' parameter to load balancer (#871 #1036)
change types (#871 #1036)
Minor renaming for consistency with other classes/fields.
Merge pull request #81 from TheWeatherCompany/issue-871

Added support for attributes (crossDataCenter, timeout, etc) on load balancers.