Allow optional custom tags in SQL Server check.
Made postgres database name configurable.
Fixes issue #523.
Add dbname to yaml example file.
Minimize number of MySQL queries in agent check
Fixes issue #591.
Merge pull request #656 from DataDog/issue523

Made postgres database name configurable.
Use 1 query for all status variables, remove extraneous import
Remove debug password
Merge pull request #654 from DataDog/optional_sqlserver_tags

Allow optional custom tags in SQL Server check.
Merge pull request #660 from DataDog/issue591

Minimize number of MySQL queries in agent check
Merge branch 'master' into windows_improvements