updated meta-rest to work on refactor 0.1.0
removed existeing planer on all classes of meta2 package
Merge branch 'future/0.1.0' of https://github.com/Stratio/stratio-meta into planer_refactor
created Planner structure to fit meta2's new architecture
Modify LogicalStep hierarchy introducing LogicalWorkflow with Transformation and Union steps.
Modify Planner and PlannedQuery.
Merge branch 'future/0.1.0' into future/0.1.0-planner-refactor

Conflicts:
	meta-core/src/main/java/com/stratio/meta/core/statements/CreateIndexStatement.java
	meta-core/src/main/java/com/stratio/meta2/core/statements/CreateCatalogStatement.java
	meta-core/src/main/java/com/stratio/meta2/core/statements/MetaStatement.java
Merge branch 'future/0.1.0-planner-refactor' into future/0.1.0

Conflicts:
	meta-core/src/main/java/com/stratio/meta2/core/statements/DescribeStatement.java
	meta-core/src/main/java/com/stratio/meta2/core/statements/MetaStatement.java