Closes synhershko/NAppUpdate/#95#124

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absinghal wants to merge 2 commits intosynhershko:masterfrom

absinghal:master

Commits on May 14, 2018

FileUpdateExTask added

abhishek.singhal
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abhishek.singhal
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Commits on May 17, 2018

OnProgress now includes execution status.

abhishek.singhal
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abhishek.singhal
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