properties for global filters in group fields/metrics
bd-12 test has been apdated
Merge pull request #1 from srdrucker/master

Updated POM to pull datastax cassandra driver.
Added support for scalar types in function COUNT
Fixed BD-13: WHERE filter combined with COUNT doesn't work
Include <summary> and <metric> values in aggregate queries when the metric computation is null (e.g., MAX on a field with no values).
COUNT with scalar fields support in query
Added support for leading WHERE clauses in metrics and aggregation groups
Merge branch 'master' of github.com:dell-oss/Doradus
top-level filters in metrics and groups
Added initial support for AS in fields set definition
Added initial support for AS in fields set definition
supported aliases in the returning result fields
Added support in parser for: linkPath IS NULL
Implemented BD-22: INCLUDE/EXCLUDE functions
new IS NULL implementation
Added alternate syntax for AS construction in aggregation groups
Update docs for recent v2.2 changes.
Fix for correct alias display name in aggregation queries
support .AS( in aggregation groups