Version 2.0

[New Features]

• #11 #12 #16 New fields for web links and email addresses

[Improvements]

• Migration from Qt4 to Qt5 (User interface library)
• Updated Dropbox certificates (Old ones are valid until August 2016)
• Implemented database version checking and upgrading on format change
• Updated about dialog to include github project link
• Compiler warning fixes

[Bug Fixes]

• #19 Unable to restore from backup on windows caused by improper sample image file permissions