Added more error-handling to code.
Updates and instructions added to shock-server config file.
Spelling error.
Edited index retrieval of Shock nodes to not require fully loading indexes into memory when retrieving a dataset.  Tested and saw improved performance.
Merge
Merge pull request #192 from wgerlach/master

upload data as scalar or reference
Deprecated functions.
Setting file_name does not persist unless node is saved.
Writing index in 16MB chunks rather than 16 bytes at a time vastly improves performance.
Removing deprecated folder.
Added comment.
Writing chunkrecord index in 16MB parts.
Simplifying new code.
Edited line indexer to write index in 16MB chunks.
Edited line indexer function GetReadOffset() to work like the sequence functions that only return io.EOF once all of the lines have been read.
Edited column indexer to write index in 16MB chunks.
Merge pull request #193 from jaredbischof/master

Mostly indexer and acl modifications.
Renaming variable.
Updating functions for creating subset nodes and for creating subset indexes within nodes to write indexes to disk in 16MB chunks and to read from parent indexes by an offset and length position rather than loading the entire index into memory.
Merge pull request #194 from jaredbischof/master

Updates to subset nodes and subset index creation.