Add contributing section
Relax contribution statement a bit
Remove misleading Sign tip
Updated Grain description.

Added Grain features and Grain themes subsections to the description.

Signed-off-by: Dmitriy Pavlenko <dmitriy.pavlenko@sysgears.com>
Allow configuring which python interpreters are tried in PythonFinder

Signed-off-by: Marshall Pierce <marshall@palominolabs.com>
Merge pull request #1 from marshallpierce/features/configurable-python-cmd

Allow configuring which python interpreters are tried in PythonFinder
Make PythonFinder code Groovier

Signed-off-by: Victor Vlasenko <vitek.vlasenko@gmail.com>