String to Dictionary function

[Paul Brodsky]

In order to encrypt a message, we need to read the contents of a map file, store them as a string, and convert that string to a dictionary that can be used by the encryption function.

Acceptance criteria:

• Can convert a string (example 1) to a dictionary of key value pairs.
• If the input is not formatted properly, no error will be thrown.

example 1:
A=Z
B=Y
C=X
...