Initial commit. Read seq from folder as fasta
Import plasmid seq as feat and mention relation in stockprop

* Using organism 'Dictyostelium discoideum' for feature
* Using 'plasmid_vector' as cvterm.name in stockprop
* Converts GenBank to FastA. If so, dbxref is for GenBank. Uniquename => DBP-ID
Added test for plasmid sequence import
Merge pull request #106 from dictyBase/feature/import-plasmid-seq

Feature to import plasmid sequences in genabnk/fasta