Enrichment operator for 015 demo.
Support specification of keys to be added to input tuple on match.
Handle exception correctly.
Fix WAL recovery

use readFully instead of read to read byte array from WAL, as sometimes
read only reads partital data from stream, causing futher reads to get
corrupted data.
Merge pull request #1120 from tushargosavi/walfix

Fix WAL recovery
Merge pull request #1117 from tushargosavi/o15demo

Enrichment operator for 015 demo.
Adding default fileStore.basePath location of DefaultDimensionStore
Adding support for string in query keys
Merge pull request #1121 from sashadt/o15demo

Adding support for string in query keys
Do not expose event schema through aggregator properties.
Merge remote-tracking branch 'origin/o15demo' into 20141015-hadoop_world
fixup javadoc tags for operator metdata
javadoc changes to support operator metadata - split input/output into two categories; fix HTML entities; add javadoc to operators that are missing it; some capitalization
add javadoc metadata for enrichment operator
Add impressions to aggregates.
Merge branch 'o15demo' into 20141015-hadoop_world
Updating docs and names for generic dimensions operators
Merge pull request #1123 from sashadt/20141015-hadoop_world

Updating docs and names for generic dimensions operators
removed files that shouldn't be checked in
Merge branch '20141015-hadoop_world' of https://github.com/DataTorrent/Malhar into 20141015-hadoop_world
Updating documentation and default settings for dimensions apps; SPOI-3305 Adding JSON Sales events generator and tests; SPOI-3306 Changing default schema to sales demo; Adding dimensions query operators, replacing productCategory type; Renaming adsdimensions package