max-width and target parameters added

user can now specify the tablet/mobile max-widths and can select whether
they want the social network to open in the same or a new tab
fixed default value for new parameters
removed apostrophe for default number value
Merge pull request #11 from Lodder15/master

Max-width and target parameters added
Merge pull request #12 from JoomJunk/master

Merge Lodders Changes back into development