Update list for NetShred X

NetShred X 5.0.8 changelog from May 15, 2017

Adds support for Firefox 52

NetShred X 4.8.7 changelog from November 27, 2015

Adds support for Firefox 42

NetShred X 4.8.6 changelog from November 6, 2015

Adds support for OS X 10.11 El Capitan, Adds support for Apple Mail 9 and Thunderbird 38

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