Merge pull request #7 from tornewuff/fix_truncation

Fix file truncation on save. Note, that rmate will probably not longer work with irix and solaris cause of unsupported "head -c". This will get fixed again later ...
updated doc-block
replaced "head -c" with dd again for compatibility reasons, use bs=1 and count=$value this time to hopefully prevent file truncation
Added new arguments to match official version.

From official repo:
(985e6f7) Add support for line, type, and name command line args.
Updated README to include new options
Merge pull request #10 from dhowden/extra-options

Added new arguments to match official version.