Add table aware operators and metadata
Fix bug in which we fail to parse an empty string in a nullable field when it occurs at the end of a file (or a record in the case of a map/reduce import from string)
Added urlencode/urldecode and replace functions
Added locate function
Refactoring to support more policies in file creation to support models in which multiple files get written based on max number of records, timeouts etc.
Working streaming writer.  This is an option for the write operator that creates a new file for each batch of records (configurable size).  Will eventually add an option to have a timer so that files are closed/recreated in a guaranteed amount of time.
Print out input file when processing data with a map operator
Escape characters when printing text
Refactoring of file system abstractions and the HDFS write operator so that it no longer has any HDFS specific code in it.
Moved to Boost 1.49.0; this entails moving to Boost Filesystem v3 and dealing with some deprecated methods in Iostreams
Functionality for unescaping on import
Added missing append method to Varchar
Necessary bump of Boost library version to 1.49 (e.g. for filesystemv3)