alternative to bistro
API enrichments: finer typing of workflows + shell command can use a package
utils module converted
transition to inner workflow type started
refactoring: workflows now ressemble bistro a bit more
ucsc_gb: fixed buggy bash invocation to concatenate chromosomes
makefile: fixed bug in building rule from workflow

previous version was incorrect when the workflow step would change the
working directory.
bowtie install
ucsc: fix chromosome concatenation script
makefile: fixed use of shell variables
added resource infos to workflow
bowtie: bowtie-build
workflow: fixed incorrect compilation of package-using commands
bowtie is back
fastQC back
samtools back
unrolled workflow restaured
workflow: no nested extract workflows

small modification that guarantees that Extract (Extract (v, p), q) is
normalized into Extract (v, p @ q)
restaured website generation
restaured lwt execution engine