Add template for new playpen projects

CONTRIBUTING.md

@@ -16,4 +16,4 @@ on the projects add to it. For your project to be added, it is important that:
 Please note that we are going to consider removing a non-working snap from the
 repo if we can't get it to work after a month without updates.
 
-Use `template.README.md` to kickstart your project.
+Use `snap-template` with our formatted `README.md` to kickstart your project.

ci-run

@@ -11,8 +11,9 @@ fi
 root_dir=`pwd`
 return_code=0
 for dir in $projects_to_test; do
-    # Don't include files in root directory
+    # Don't include files in root and template directory
     [ ! -d $dir ] && continue
+    [ "$dir" = "snap-template" ] && continue
 
     echo "Testing $dir"
     cd ${root_dir}/$dir

snap-template/snapcraft.yaml

@@ -0,0 +1,29 @@
+name: my-snap  # the name of the snap
+version: "0.1"  # the version of the snap, which can be any string
+summary: This is my-snap's summary  # 79 char long summary
+description: |
+  This is my-snap's description  # a longer description for the snap
+  which can expand multiple lines.
+confinement: devmode  # start with devmode, then use "strict" to enforce system
+                      # access only via declared interfaces
+
+apps:  # declarative apps come in second place
+  my-snap:  # if only one command is exposed, please use
+            # [app name == snap name] to have a shorten command executable.
+    command: my-command
+
+parts:
+  my-part:  # Replace with a part name of your liking
+    # Get more information about plugins by running:
+    # snapcraft help plugins
+    # and more information about the available plugins by running:
+    # snapcraft list-plugins.
+    plugin: nil
+    # Lines for yaml files (including description) should be under
+    # 80 characters. If more if needed, they should be
+    # broken up in multiple stenzas.
+    # For example, a list like [foo, bar, baz] should be broken up into:
+    # - foo
+    # - bar
+    # - baz
+    # as soon as the line is more than 80 characters.