0.15.0

• Add opts for ip command.
• Refactor ip object commands into smaller methods. Refactor version for consistent use and stub ability in funcitonal test cases.
• Add functional test cases for ip command.
• Add append_flag_no to Kanrisuru::Command class. Adds no to value for falsey statements. The no flag is commonly appended to indicate a deactived state for many arguments passed to programs on the command line.
• Fix test case transfer by appending the osname to the filename to avoid parallel overwrite.