Merge pull request #2 from road2stat/master

Changed Depends to Imports; Minor fixes to pass R CMD check
added Makefile to repo
update README to describe installation using make
add an R script to make parameters; intention is to do similar Rscripts for other tasks to facilitate doing only tasks that need updating
added a make_data.R Rscript and a Makefile to illustrate (artificial) use
added scripts to run method and score method
minor change - moved some of functions in score.R to method.R
added facility to pass parameters to datamaker, to avoid use of parammaker function
changed code to make some structural changes to the way the dsc works: removed params and flavors, replaced scenario_seedlist with a list of scenarios, where each scenario is defined by a list that includes its name and function used to generate data
modified run_dsc to allow to run on just subset of methods or scenarios
removed the defunct make_params script
updated some code to make consistent with changes - removing parammaker etc
replaced mkdir with dir.create
fix bug with ssub; minor changes to documentation
merge upstream updates