changes for dropping multiple columns
Adding ClientKeyValue support to phoenix

This allow us to do zero-copy KV creation.
 We only support HBASE 0.94.14+ (currently in development) for the
custom KV building.
Merge pull request #537 from maryannxue/master

Issue #503 Augment explain plan for join queries
Merge pull request #555 from jyates/client-keyvalue

Adding ClientKeyValue support to phoenix
Adding @Ignores for ClientKeyValue tests

Some won't be supportable until phoenix moves to HBase 0.94.14
Be more specific about supported HBase version

Per Julian Hyde's comment on the user list.
Merge pull request #561 from ndimiduk/patch-1

Be more specific about supported HBase version
Change DatabaseMetaData.getIdentifierString from single quote to double quote, enhance getColumns test
Changing version in master to 3.0.0
Remove dependency on wal class for earlier HBase version support
drop columns
Use scale of 1 for CEIL math context
multiple column drops
1. Fix NPE for M/R Bulk loader for no index DDL 2. Params name mismatch 3. Zookeeper configurtion fix
Update README.md
Merge pull request #552 from mravi/master

changes for dropping multiple columns
adding test for dropping pk
Merge pull request #576 from mravi/master

adding test to ensure pk column cannot be dropped
Merge remote-tracking branch 'upstream/master'