updated README to ChibiOS ver_2.6.8 commit
README.txt slightly updated.
Fixed typo in authors list
Added some additional information in the README.txt file.
README.txt: deleted surplus blank line.
README.txt updated:- maximum line width was increased to 80 (from 70)- several updates on content and structure
CITEC acknowledgment text was modified to the preferred wording.
Initial commit of AMiRo-OS version 1.0. This is the first version released open source.