-Use stxxl vectors with char and unsigned int containers
-Write out the entire character vector to fil
-Cap the names at length 255 during the parsing so we reduce
the amount of memory used by stxxl vectors and we can do a
direct writing of the character vector to .names
-For large datasets with very many unique names, stxxl::vector can corrupt
data. Technically, we should only be using stxxl:vectors with POD. Other
types might lead to strange/unpredictable behavior as we noticed here.
-See http://algo2.iti.kit.edu/dementiev/stxxl/trunk/FAQ.html
* Adds a data structure, RasterSource, to store parsed + queryable data
* Adds bindings for that and relevant data structures as well as source_function and segment_function
* Adds relevant unit tests and cucumber tests
* Bring-your-own-data feature
