match_ac: Exact String matching using the Aho-Corasick algorithm
In Starr: Simple tiling array analysis of Affymetrix ChIP-chip data

The Algorithm is designed to match a given set of sequences to a text. This function is used by remap for mapping reporter sequences to the genome.

1	match_ac(dictionary, text, complementary=FALSE, reverse=FALSE, reverse_complementary=FALSE, nseq)

`dictionary`	Set of sequences, given as a character vector
`text`	At least one text, to match the sequences to.
`complementary`	If TRUE, the sequences are searched in the complementary strand of the text
`reverse`	If TRUE, the sequences are searched in the reverse strand of the text
`reverse_complementary`	If TRUE, the sequences are searched in the reverse complementary strand of the text
`nseq`	number of sequences to search in one run