[hwa] Homeworkassignment v3.0

• Rename to homeworkassignment
  • To comply to CTANs requirements of all lowercase packagenames.
  • Add proof by contradiction environment
  • Create environments for all existing proofs
    • Contradiction, plain üroof and a varable one are implemented; that should be enough
  • [2/2] Add points for excercises
    • Expand \textbackslash{}newproblem \textbackslash{}newsubproblem etc by an optional argument to take the maximum ammount of point one can gain at this problem.
      • When passed this is passed to \textbackslash{}newsubproblem, create a box to write the points down
      • Add this number of points to the »gradingtable«
    • To implement this, the existing optional argument, taking the exercise number has to be replaced with an own command
      • replace the optional argument of \textbackslash{}newproblem by a new command \textbackslash{}setproblemnumber
    • Solved different
  • Add Option to remove the hlines from the layout
    • Standard hlines=all
    • hlines=none remove all
    • hlines=header just remove the hlines around the Title
  • Remove legacy styles
  • Rework Docu
    • Unite Implementation and Documentation part of Documentation
    • Document all features
    • Update Changelog
  • Add allowdisplaybreaks
  • BUG of onecolumn and maketitle
    • Pull changes from NumRech u3
  • BUG Subproblem counter not reset on newproblem with number (see NumRech u5)
    • Fix
    • Check if subsubproblem works!