[batch] combined creation of UniqueRequest and changed the documentation
[batch] use builtin append method instead of doing the same thing manually
[batch] improve style and add documentation
[batch] create a Batch instance in an elegant way
[index] added CreateNodeIndex method and removed error checks
[neo4j] removed new lines after method declarations
[node] use fmt.Sprintf instead of string concatenation
[node] refactored some lines
[node] minified variable names
[node] instead of using make, generate maps on the fly and return
[relationship] instead of using make, generate maps on the fly and return
[relationship] use fmt.Sprintf instead of string concatenation
[relationship] instead of using make, generate maps on the fly and return
[node] remove default case in switch statement and return default value
[utils] add documentation