Created data_structures package and moved all folders in to it
Made parens folder into package. Corrected 3.x compatibility issues
Made sorts folder into a package. Fixed some import errors that resulted
Fixed compatibility issues between 2.7 and 3.x
PEP-8 fixes
Added init files to all directories. Recreated linked list
More PEP-8 fixes. Fixing import errors
Fixed binary heap import errors
Refactored binary heap tests to be more modular
Cleaned up BST files
Cleaned up files for doubly linked list
Cleaned up files for graph
Cleaned up files for hash table
Cleaned up files for priority queue
Cleaned up proper paren files
Cleaned up files for queue
Cleaned up files for stack
Merge pull request #27 from im-auld/reorg

Reorg