Better names for query modes

[lschmelzeisen]

We currently support the following query modes:

• Sequence: this is means we would name P^*, e.g. sequence probability of P^n multiplied with length frequency of the sequence.
• <Order>: this means just P^n (in code this is called Fixed)
• Markov<Order>: same as sequence but with markov assumption
• Cond<Order>: Just the higher order conditional probability P^n

These are names both used in code and also as command line arguments. I don't like the names 'Sequence' or 'Fixed', are there any better? Also the descriptions are horrible.

[lschmelzeisen]

Do we want something like MarkovCond<Order>?