Delete reservations warning#2

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wiredloose wants to merge 3 commits intoding2:masterfrom

vejlebib-ding2:delete-reservations-warning

Commits on Jan 7, 2013

renaming function names to clarify difference between reservation updates and reservations deletes and their related form functions
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re-implementing reservation delete functions to include a confirm pop-up in the flow
wiredloose
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Commits on Feb 6, 2013

re-implementing row delete button's submit handler
wiredloose
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