Cleanup release scripts

[hvge]

I was trying to make release 1.1.0 and I found out that we have a kind of mess in the release scripts. I fount the following problems that should be addressed:

• prepare-release.sh doesn't commit and push all local versioning files
• I hotfixed the prepare-release script to add support for android versioning, but it's kind of awkward that there are some templates located in Deploy folder, some in scripts, etc...
• We can automate release artifacts upload to the github. I developed a nice script for that.