Implemented support for UID COPY and UID MOVE for servers that don't support UIDPLUS
Implemented support for UID COPY and UID MOVE for servers that don't support UIDPLUS

Fixes issue #72

dsbenghe/MailKit,sstraus/MailKit,jstedfast/MailKit,FubarDevelopment/MailKit,jamie-dainton/MailKit,mganss/MailKit,rajeshwarn/MailKit,eino-makitalo/MailKit,nachocove/MailKit,matt2003/MailKit