updated dlib
simplified deserialization code
When an exception was thrown the code was calling delete instead of
mitie_free() which is wrong.  This has been fixed.
I changed the serialization format for the objects in MITIE-models.

I also added a get_fingerprint() method to the objects so that we can
version their contents.  This way other models that depend on each other
can identify which version of each model they are trained to use.

Finally, each object in MITIE-models now has a serialization format that
begins with a string identifying the name of the class in the file and
then the serialized object itself.
updated ignore list
Added a binary relation extraction API
Added proper error handling
removed unused variable
Cleaned up makefiles
cleaned up gitignore list
added *.a to gitignore
yet more makefile cleanup
renamed a folder
Added a relation extraction example program
renamed another folder
Added more comments
Added another example program
Fixed typo in comment
Moved the conll parsing code into mitielib
Removed cruft