Fix generators

generator: `watirmark project ` relies on rubigen 1.5.9 or later but we don't have it yet.

After fixing rubigen it was time to create project

but 

`script/generate.rb mvc workflow whatnot`
 
was failing

fixed that

and after I was able to generate all the files then

runtime errors


This fix: 
- sets script/generate.rb to chmod 755
- puts back adding rake task to rakefile (not sure why it was taken out)
- fixes appending workflow.rb entries for new workflows created
- fixes Gemfile entries
- writes cucumber html to app root since cucumber does not have path creation in io formatter (we can work with that)