Give minimal exSTRa repeat database example

[trickytank]

Give example of exSTRa repeat database format with minimal columns.
Perl scripts currently requires (unimportant means I believe it makes no difference to output in Perl script):

• locus
• gene (unimportant)
• location (unimportant)
• motif
• strand (when taken from genome, just '+')
• chrom
• start
• end
• perMatch (unimportant)
• perIndel (unimportant)

There are other columns used by the R package. We can check these later.