Fixed danialfarid#1070

Merge branch 'master' of https://github.com/danialfarid/angular-file-…

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Fixed validation on model change, added ngfDataUrl filter

Fixed danialfarid#1038

Merge branch 'master' of https://github.com/danialfarid/angular-file-…

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Fixed ngf-keep, merged with keep-distinct

Fixed danialfarid#1043

Merge branch 'master' of https://github.com/danialfarid/angular-file-…

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Fixed no model issue

Merge branch 'master' of https://github.com/danialfarid/angular-file-…

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