Pull INDEX out of constraint handling during CREATE TABLE
Add getStorageFormat() to interface
Remove unused attribute from CreateIndexNode
Use IndexDefinitionNode during ALTER as well
fix, to ensure proper handling of booleans in combination with NOT in a where clause with an IS node
merge SytzeH: fix, to ensure proper handling of booleans in combination with NOT in a ...

Merge pull request #121 from SytzeH/sql-parser/booleanConditions
https://github.com/FoundationDB/sql-parser/pull/121
merge nathanlws: Index node consolidation and cleanup

Merge pull request #120 from nathanlws/sql-parser/no-constraint-name-index
https://github.com/FoundationDB/sql-parser/pull/120
Rename for generality
AlterTableNode gets ExistenceCheck argument
Tests
IF EXISTS support for ALTER and DROP actions
More tests
merge nathanlws: Support for IF EXISTS clause on ALTER

Merge pull request #127 from nathanlws/sql-parser/alter-if-exists
https://github.com/FoundationDB/sql-parser/pull/127
Add gettor
merge nathanlws: Add ConstraintDefinitionNode#getExistenceCheck()

Merge pull request #128 from nathanlws/sql-parser/cdn-get-existence
https://github.com/FoundationDB/sql-parser/pull/128