v1.2

What's Changed

• Adds a function to count the number of attempts students made on assignments by @dbosk in #5

All by @dbosk:

• Adds a function to count the number of attempts students made on assignments
• Adds attempts to all, improves doc
• Moves results cache to local directory
• Improves stats on the results of the prgm and prgi courses
• Makes fetch_ functions try to refetch if the file is empty
• Adds throughput analysis
• Adds pass_time, adds throughput to stats in intro

Full Changelog: v1.1...v1.2