Issue with tx managementt in graph sql queries was fixed.
Fixed slow down on unmarshalling huge link sets.
Fixed issue #1982
SQL: fixed graph functions issue with chain call
Fixed issue #1991
Minor: remove extra empty document when expand and no target used at the same time
Issue #1984. Union() renamed to UnionAll()
HTTP GET /database: added index information
Improved performance of Dijkstra and shortest path algorithms
Merge branch 'develop' of https://github.com/orientechnologies/orientdb into develop
Select: supported usage of TIMEOUT keyword even without FROM clause
Graph: supported any collections to manage edges
Merge branch 'develop' into rid-set-sbtree

Conflicts:
	graphdb/src/main/java/com/tinkerpop/blueprints/impls/orient/OrientEdge.java
	graphdb/src/main/java/com/tinkerpop/blueprints/impls/orient/OrientVertex.java