Option to change the order of new element

Adding the support of “stack_order” attribute for “add_another”
function. This will decide where to place the new item.
use proper names
add another position
Merge branch 'master' into add-another-stack-fix
save to post parent
unit tests
test fix
fixed tests
limit to post context; add another test
paying the ticket from the coding standards police
yoda conditionals, per additional ticket from coding standards police
Merge branch 'save-to-post-parent'
Merge branch 'master' into add-another-stack-fix
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into add-another-stack-fix
get latest (svn up)
add test for markup
add test for position
fixed failure to properly read exact-match setting in autocomplete fields
Merge pull request #266 from nschoenholtz/autocomplete-copy-bug

fixed failure to properly read exact-match setting in autocomplete field