Renamed README -> README.md and other fixes

 * Renamed README -> README.md for readability in Github.
 * Spaces, typos and formatting fixes.
Fixed name of rules/README.md in README.md
Merge pull request #319 from kartikm/rules-README

Renamed README -> README.md and other fixes
Remove unused ime-inactive.* images

Issue: #325
Merge pull request #326 from kartikm/ime-inactive-removal

Remove unused ime-inactive.* images