formula aware version cdata().
remove do.ind when one row per iteration
finer tuning of files to ignore in sandbox
auto update to add cdata and remove .cdata_old
dealing with non-formulas better using non-standard evaluation
adding groups arg to aggregating functions.
new cdata(); different output formatting; rename to _f, _v
adding groups argument to aggregating functions
auto updates
updated pdf
Merge branch 'beta' of github.com:rpruim/mosaic into beta

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.