Version 0.2.0

- Now accept compressed input files.
- Added option "-T", which searches 3'-end first, then the best match's 
	5'-adaptor is used for 5'-end search.  This is useful when the 
	barcodes are in the 3'-end and option "-B" is used.
- Added option "-k", which keeps all reads in the same output file 
	specified by -o, even for failed reads.
- Added option "-K" to keep failed reads in a separate output file.
- Changed phred_offset=33 as default for the quality scores.  The new version 
	is compatible with the previous versions: the "-S" option is still 
	accepted with the same effect as the default (phred_offset=33).  
	The option "-i" will switch to phred_offset=64.
- Added option "-z" to compress the output file.  The command for compression 
	can be specified by option "-Z", with default="/bin/gzip -f".
- More summary information is added, such as the error distributions for
	each adaptor.