Added folder, package, gitignore and readme for new GUI.
Added example input file in test data directory.
Created parser module with brief doc but no implementation.
Made test folder a python package and added base_tests module with a class that facilitates reading from test files.
Added parsing for basic observation list at top of astrom files.
Test case refactoring; parse file in setUp since there is only one test file at the moment.
Added test case for retrieving basic observation details like exposure number, ccd number
Added string_utils module with function for splitting strings on multiple spaces.
Can now parse observation headers using regex.
Added parsing of system header from astrom file.
Added parsing for source data.
Refactoring: extracted private methods for each section of parsing for 
clarity.
Refactoring: splitting regexes on multiple lines to make them more 
readable.
Refactoring: static factory method for creating Observation objects from 
parsed data.
Added basic module for resolving observations to VOSpace URIs simply
based on file location conventions.
Added skeleton of main application script with basic argument parsing.
Added some more documentation to parser.
Added image_retriever module with basic CutoutCalculator class.  Also has
 stub of an ImageSliceRetriever class.
Added view package with very ApplicationView that gets launched from 
app.py.  The view is just an empty wxpython frame.
Added debug_mode parameter to ApplicationView.launch.  If true this will
cause the wxpython inspection tool to be simultaneously launched with 
the application.