Apr4-2014 get cupid predictions' sequence
Apr4-2014 infer 3prim coordinates
Apri5-2014 step2: get binding sites
57binding sequecen, ouptut by gene
 getBSsq add bs start pos in 57bp
get 3putr coordinate
3 search methods
Apr7 2014, mainly for miRNA binding sites, and mutations in 3Prime UTR