6-update5

Added a 2nd profile called "Alphanumeric" which can be deleted if desired.
Addresses issue #125 about a potential visual replay attack.
Now protecting master password hash feature & sync data with PBKDF2 for increased security.
Use a hidden class to replace setting .css("visibility", "hidden") all over.
Added a huge red "Reset" button on "General Option" page to reset local profile data.
Fixed sync so previously synced settings aren't wiped when trying to sync a new computer.
General code maintenance & optimization.