Improvements of the CollectionType Documentation#3338

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peterrehm wants to merge 3 commits intosymfony:masterfrom

peterrehm:form-empty-data

Commits on Dec 14, 2013

Enhanced documentation to clearify the require option and added the option for symfony/symfony#9773
peterrehm
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Commits on Dec 15, 2013

Formatted and minor improvements
peterrehm
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Commits on Dec 27, 2013

Fixed explanation of field options
peterrehm
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