Update/remove outdated information

- wiki link was outdated, fixed
- remove outdated note about SVN
- some whitespace fixes

README.md

@@ -4,19 +4,12 @@ postfixadmin
 PostfixAdmin - web based administration interface for Postfix mail servers
 
 
-Technically this project is still hosted in SVN/SourceForge. However, we welcome git pull requests and will merge them into subversion as necessary. If this repository (on github) becomes well used, we'll probably migrate.
-
-(DG. 2014/05/07)
-
-
 Useful Links
 ------------
- - [Probably all you need to read (pdf)](http://blog.cboltz.de/uploads/postfixadmin-30-english.pdf) 
+ - [Probably all you need to read (pdf)](http://blog.cboltz.de/uploads/postfixadmin-30-english.pdf)
  - http://postfixadmin.sf.net - the current homepage for the project
  - [What is it? (txt)](/DOCUMENTS/POSTFIXADMIN.txt)
  - [Installation instructions](/INSTALL.TXT)
- - [Wiki](http://sourceforge.net/apps/mediawiki/postfixadmin)
+ - [Wiki](https://sourceforge.net/p/postfixadmin/wiki/)
  - [Mailing list](https://sourceforge.net/p/postfixadmin/discussion/676076)
  - [IRC channel](irc://irc.freenode.net/postfixadmin) (#postfixadmin on irc.freenode.net).
- 
-