explorer.log should be in AppData; failing to be written in Program Files (x86)

[voxoid0]

Great program! When an exception is thrown though, the error message says "Unhandled exception occured. Additional information written into 'C:\Program Files (x86)\LiteDbExplorer\explorer.log'". First, the log file does not exist, which I would guess is because of the second problem, which is that Program Files folders are not supposed to be written to, and cannot be written to if the program is not running under an admin user. Data like log files should be written to an AppData folder.

[michalhainc]

Duplicated with issue #17