mention use of other open source code in readme

We use code from several open source projects to assist us, the licenses of that code & a link to the original code location is located in the headers of those java files
refactor some installer, and analytics code to better packages/classes
add 2nd analytics setup for new analytics server
make sure to refactor installer stuff inside offline dialog
Updated CreeperHost logo and link.
Merge pull request #774 from Cloudhunter/master

Updated CreeperHost logo and link.