Allow multiple sessions in one authentication

[jessejensen]

Rather than having a Connection object that does authentication then creates a session, there should be multiple Session objects that implicitly create and share connections as needed.

s1 = ebscopy.Session() s2 = ebscopy.Session() r1 = s1.search("blue") r2 = s2.search("red") s1.disconnect s2.disconnect

[jessejensen]

Basic code works.

Use cases:

• Explicitly create connection first \ with or without specified credentials
• Implicitly create connection by creating session (working now) \ with or without specified credentials
• Create session, let it find a good connection?

Need to update:

• older unit tests
• plain old test
• README.md
• INSTALL.md

Need to create:

• Sample usage

[jessejensen]

all done