tangelgram - added cex_main parameter.
Version bump to 0.11.0

(this is actually from the 24th, but it needed recovery due to some git-issues having to do with caching)
color_labels - added a "warn" parameter. And also set the default (in case no k/h is supplied) - to just color all of the labels.
Added "warn" parameter to: assign_values_to_leaves_nodePar, And set it to FALSE when used inside "tanglegram".
tanglegram now returns an invisible list with the two dendrograms (after they have been modified within the function).
untangle_random_search - made sure the function will return the original trees if no better tree was found.
Seperated 2013-09-05_Boston-useR.Rpres into two files (since RStudio is not able to handle them)
tanglegram now has "sub" and "cex_sub" parameters.
 untangle_step_rotate_2side added k_seq parameter.
Finished tanglegram and untangle. We are left with
"trim" is now called "prune"!