adding parser that turns log line strings into dictionaries

[kitrady]

Things this parser class does:

• Categorize a line as either a header line (the line of characters that come before and after the startup info), a log line (a log line that follows the expected format), or an unstructured line (a line that either is an improperly formatted log or part of the info given at startup)
• Parses a log line and returns it as a dictionary
• Can be configured to handle different header lines, different types and numbers of "fields" in a log line, and different field separators