new gulp tasks, iOS deletablelist added features 

New Gulp Tasks
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CSS
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gulp themes (alias for gulp less)
gulp android
gulp ios
gulp win

JS
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gulp chuijs

Examples
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gulp android_examples
gulp ios_examples
gulp win_examples

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iOS deletable list features
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swipe left shows delete option
swipe right show delete option on rtl

Deletable indicator, rotate  by 90deg on click

Remove delete option from all other list items.