Merge pull request #4 from MichaelSchoebel/master

Add missing domainrank.txt and update howto.html
Merge branch 'fpc-linux'
Updated README.md with a note about compiling on Linux
BugFix: Severe memory-leak in RobotNew

The memory-leak was located in tGetUrl. It didn't
free itself on termination nor did it free ThisHttpGet.

This bug was only in the Linux-version.
Merge pull request #7 from MichaelSchoebel/fpc-linux

Fix severe memory leak on Linux, and some other minor stuff