DropIt v8.2

This is a release with some improvements and fixes. This is the complete list of changes:
- added abbreviation modifiers to encode / decode with Base64 (ANSI and UTF-8)
- added option to choose if do or not a first scan of monitored folders at startup (read 4.4 of the Guide)
- added option to choose the mode to manually rename duplicates (read 4.4 of the Guide)
- restored cryptography modifiers
- fixed issue removing source of encrypted folders
- fixed Unicode support for associations (UTF16 Little Endian)
- fixed some minor bugs