completing #15

since reshape2 and dplyr provide generic, apparently we can’t import.
functional needed because removed from depends in rmr2
turned some API crud into examples #24
update with API changes #24
the big API reorg #24

choose between similar function, rename select transmute and add a more
focused  select
that ungroup has no reason to exist.
duplicate of global env is not called global env, so the recursion stops with an empty env error
big API change #24
we have a magic.wand why not make boilerplate disappear
big API reorg #24
default doesn't exist anymore
don't duplicate info, add description
big API reorg #24
reorder examples shorten and better comments
fixed issues with non standard eval and refactored around magic.wand and non.standard.eval.patch
select had  no alias
continue update of tutorial for new API
dead code
typo
not clear why this is needed, but magic.wand fails without
avoid infinite recursion by setting data frame method first