return vector of observed statistic(s) and matrix of permuted values of the statistic(s) under the null hypothesis
add a permustats method for class 'permutest.betadisper'
update example to use the new permustats method & draw some plots
update reference materials
Additional improvements following discussions with Jari:

 * summary.permustats now handles multiple types of alternative hypotheses
 * print.summary.permustats prints different types of alternatives in separate tables
 * permustats.permutest.betadisper now correctly specifies the multiple alternative hypoetheses if pairwise tests were performed in permutest.betadisper
document that probs can be a list if a vector of alternatives is present.
set dimnames rather than colnames
add an example of specifying probs
 * Add some tests of user-supplied 'probs'
 * rbind together tests with same alternative
implement Jari's suggestion of a single table with lower and upper defined for user-specified interval; for less and greater, upper and lower will be blank, respectively, under this scenario.
tweak interval statement in print method
update the example for permustats to illustrate use of interval
update the Rd fiile for permustats to remove argument probs and add argument interval
really fix the printed interval statement; didn't set the separator
Update the reference materials for testing examples
don't transpose permutations; treat printed elements as test statistics 'tst.ind' in printCoefmat
include an indication of the type of test statistic in the names of the statistic component of the returned object
Modification to the help to reflect removal of 'probs' and addition of 'interval'; other tweaks and minor changes
update the test material for examples
Need to replicate alternative if methods only supply a single alternative for multiple statistics, as per permustats.adonis and first example in ?permustats