Speed up Bio::DB::Fasta using compiled regular expressions or Inline::C

* If available, use [Inline::C](https://metacpan.org/pod/Inline::C)
* As a fallback, using compiled regexps in *s///* speeds up *subseq()* by about 7% from 7.76s to 7.22s over 32358 calls on Variant Effect Prediction data. See my [gist benchmarks]( https://gist.github.com/rocky/61f929d58a286189a758)
* Compile regular expression for *compound_id* in *Bio::DB::IndexedBase*