Amino acid to score conversion
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Input: amino acid sequences in the fasta format
Output: 5PC-score sequences (each amino acid is transformed to 5 scores)

Output file format:

[TAB-delimited flat table] each sequence is converted to a single line with N*5
values (N is the sequence length). The seqeunce ID is added at the beginning
of each line. This format can be used as the input file for the "ACC-Mean
transformation" program on our web site

[TAB-delimited 3-way table] each amino acid is converted to corresponding five
scores. The format is shown below. The first column is the sequence ID, 2nd
column is the aa position, 3rd column is the amino acid.

At1g11000.1	1	M	1.83	0.07	-1.76	-0.37	0.00

The output uses N lines for an entry with N amino acids. This format is 
convenient for using 'sapply' R/S function (e.g., to obtain the column mean).