Use random cache folder#2

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yaapis wants to merge 5 commits intoterion-name:masterfrom

Commits on Sep 17, 2013

Use random cache folder
yaapis
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Commits on Oct 15, 2013

added try-catch blocks to Thumb methods
yaapis
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rewrite try-cathc logic. Now in case of broken image empty HtmlObject\Image object will be returned
yaapis
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Commits on Feb 10, 2014

add resize proportional to width & height
yaapis
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Commits on Jul 15, 2014

update composer
yaapis
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