modify readme
change comments in README
fix problem README
Merge pull request #14 from androidsx/new-readme

modify readme
Minor changes in the text
Provide a different email address for the two sample apps
Merge pull request #20 from androidsx/copy-improvements

Minor changes in the text
Merge pull request #18 from androidsx/email-config

Provide a different email address for the two sample apps
Resolve conflict