de novo assembler integration

Description: Assembling genomes de novo is an essential step not only for genomes for which the reference sequence is unknown, but also for double-checking contigs generated by a short read aligner. There are dozens of de novo assemblers: Velvet, SOAP-denovo, Mira, etc.
Links: http://seqanswers.com/wiki/De-novo_assembly (list of assemblers)
Scope:
Integrate a de novo assembler into UGENE and provide a GUI for it. The integrations steps are the following:
1. Select a de novo assembler. Make sure that an assembler can be run on a PC.
2. Integrate the assembler and develop a GUI similar to the GUI that exists in UGENE for short reads alignment with read selection, parameter settings and showing the result in Assembly Browser.
3*. Add the corresponding workflow element in Workflow Designer