v1.2.0

• ADD: Belanger and Husi (2006) dating method (#3).
• ADD: binomial co-occurrence assessment method (similarity between types).
• ADD: SimilarityMatrix S4 class to represent a (dis)similarity matrix.
• ADD: plotSpot method for SimilarityMatrix object.
• ADD: plotSpot method for OccurrenceMatrix object.
• ADD: [ methods for several classes.
• FIX: similarity() now returns a SimilarityMatrix object.
• FIX: plotBar() does not add confidence interval by default.
• FIX: add an argument to seriate() to pass a BootCA object (#4).
• FIX: add an optional progress bars with pbapply in long running functions.
• FIX: deprecate useless accessors.
• FiX: OccurrenceMatrix now stores the number of times each pair of taxa occurs together in at least one sample.