Added options for custom line endings and outlook import; plus small bugfix

MS Outlook (at least of Office 2010; I can't test with other versions) cannot import multiple contacts from vcf files; it has however csv import. The csv import requires dos-style line endings, so first I added the option to change the line ending style from the default (unix) to dos and old-style mac.
Additionally, the german outlook requires german csv headers to get the field associations right automatically, so I added a special option for the correct headers, so files converted with this option can be imported with manual field rewiring (this can for sure also be done for the english or other language versions).
I also found a small bug (. instead of ;) that duplicated a lot of the csv headers.