* Added CD (Continuous Deployment) snap packaging support
* Added required files to create a snap package. Launchpad account will automate the build whenever code is committed to git repo
# What is a snap?
A snap :
* is a squashFS filesystem containing your app code and a snap.yaml file containing specific metadata. It has a read-only file-system and, once installed, a writable area.
* is self-contained. It bundles most of the libraries and run-times it needs and can be updated and reverted without affecting the rest of the system.
* is confined from the OS and other apps through security mechanisms, but can exchange content and functions with other snaps according to fine-grained policies controlled by the user and the OS defaults.
# Notes on improvements squashed into this PR
* Reduced the snap size by removing files from prime stage.
* Fixed typo in snap summary, thanks @justinclift for pointing out
* Reduced the size of snap package by removing big files from the package
* Added revno to the version script
* Added long description of snap package from deb package
* Borrowed some code from vlc snap script to fix fall back UI (need further research to fix issue)
* Added echo message to request users to report issues with snap package
Signed-off-by: Navdeep Singh Sidhu <deepsidhu1313@users.noreply.github.com>
