Merge lp:~kyrofa/crackly/add_readme into lp:crackly

[Kyle Fazzari]

Add README.

Add README.

=== added file 'README'
--- README	1970-01-01 00:00:00 +0000
+++ README	2015-10-30 14:13:40 +0000
@@ -0,0 +1,29 @@
+Crackly
+=======
+
+Crackly is an overly-simplistic prototype of adding .desktop file support to
+Snappy. It's really more-or-less a research project for allowing Clicks and
+Snaps to run alongside each other on the current phone image.
+
+Snap is Click's successor, but it's not quite ready for prime-time yet (i.e. it
+can't completely replace Click just yet). We don't want phone app developers to
+be caught unaware when the phone OS moves from Clicks to Snaps, so we'd like a
+period of time where Snaps can be run alongside Clicks to allow for a smooth
+migration. This research is currently being done within Crackly. Specifically,
+Crackly has only two capabilities: installing and removing Snaps. It uses
+Snappy to do this, but adds the following capabilities:
+
+- Prevents installation of Snaps containing services. The reasons for this are
+  twofold:
+     1. Unrestricted services will kill the battery (which is why Click services
+        aren't allowed either), and
+     2. Snappy services utilize systemd for their lifecycle management, and the
+        Phone images are still based on vivid (i.e. Upstart).
+- Adds the capability to generate (very basic and prototypical) .desktop files
+  for Snap binaries upon install that are supported by the rest of the Phone and
+  Desktop ecosystem. These .desktop files are placed in
+  /usr/share/applications/.
+
+Note that, if testing this on the phone, it needs to be mounted RW so that snaps
+can install into /apps and .desktop files can be placed in
+/usr/share/applications/.