fix: cleaned up partial merge from commit 57886fb.

The partial merge left the Eclipse project description in an invalid
state.
Copy Android .gitignore template from github repo.

.gitignore is a file with a list of regular expressions that git uses to
match files it should not track such as binaries and autogenerated files.
Template repo: github.com/github/gitignore
Merge pull request #2 from corburn/cleanup

Fix Eclipse metadata