Merge pull request #1 from PrestaEdit/dev

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Merge pull request #2 from PrestaEdit/dev

[+] Add GitHub link in about
Update ajax.php
Update index.php
Update download.php
Merge pull request #3 from DevNet/patch-1

Update ajax.php
Merge pull request #4 from DevNet/patch-2

Update index.php
Merge pull request #5 from DevNet/patch-3

Update download.php
Merge pull request #6 from PrestaEdit/master

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