v1.2.0

Implemented enhancements:

• Support ls on files #8

Closed issues:

• "Usage" section of help text is missing arguments #13
• get command panics without second argument #10

Merged pull requests:

• Check args slice bounds in all commands #18 (waits)
• Add argument information to "usage" section of help text #14 (waits)
• Check args slice bounds in get and put functions #12 (waits)
• Support ls on files #11 (waits)