[dotnet] Add a Low Hanging Fruit file to suggest jumping in points fo…

…r anyone interested in doing so.

dotnet/LHF.txt

@@ -0,0 +1,45 @@
+"Low Hanging Fruit"
+===================
+
+This file contains tasks that should be relatively small and easy. If
+you want to start hacking on the 6model implementation on .Net, this
+is a great way to jump in! Questions? Try catching jnthn on #perl6
+on freenode.
+
+Comparative operators
+---------------------
+DIFFICULTY: Easy-Intermediate
+SKILLS: NQP, C#
+DETAILS:
+At the moment, there is no support for operators like <, <=, lt and
+so forth. Two things are needed to make this happen. First, you'll
+need to make some new entries in runtime/Runtime/Ops.cs as a way to
+actually provide the low-level comparative logic. See equal_ints for
+example. Then you'll need to add some entries to NQPSetting.pm (it's
+outside of the dotnet tree, in /common/NQP). Finally, see about
+getting the relevant tests running from the nqp-rx test suite.
+
+Split Up Ops.cs
+---------------
+DIFFICULTY: Easy
+SKILLS: C#
+DETAILS:
+This file is getting a bit too long, so it's time to split it up. We
+still want to end up with a single Ops class, but we'll spread it over
+a few files and use partial classes. Find some sensible divide (e.g.
+all the ones that work with P6list could go in one file, all those
+that relate to exception throwing etc in another). Don't go overboard,
+but try and get some sensible balance. :-)
+
+Improve P6list and NQPArray
+---------------------------
+DIFFICULTY: Intermediate
+SKILLS: NQP, C#
+DETAILS:
+NQPArray needs to have push, pop, shift and unshift methods added.
+Along the way, the P6list representation likely wants to stop using
+the C# List class and start to use an array that it resizes on
+demand, and there may be a need for a couple of new Ops. Note that
+push won't need anything new, since it's just setting another list
+element on end. pop on the other hand needs to end up with the list
+showing up as shorter.