Feature suggestion: Pattern analyzer (command line only?)

[jkboyce]

When a siteswap pattern is entered, display information about the pattern:

• problems with the pattern, if it isn't valid
• number of objects
• is the pattern prime or composite (and subpatterns if the latter)
• pattern inverse, if it exists
• pattern dual
• states used by the pattern

Output format is straightforward from the command line. Output method is TBD for GUI-based pattern input.