content update

Some modifications made to various sections in terms of wording and
information provided. 'Open Issues' section added some content, not sure
of the actual format desired.
As for the 'External Interfaces' section, I don't believe Google Earth
fits into this section. While we interact with it, it is one direction
and is not "provided" by the customers. Thoughts?
Ignore this. Doubt its going to work anyway
Merge branch 'master' of https://github.com/nicole28/CMSC345.04-TheAviators

Conflicts:
	Documentation/srs.docx