sonar cleanup: String.indexOf(char) is faster than String.indexOf(String).
sonar cleanup: Local variable names should comply with a naming convention
Revert "sonar cleanup: Local variable names should comply with a naming convention"

This reverts commit 7a2db90455578cf06b222bc5e4df479cb0584354.
added idea resources to ignore list
sonar cleanup: Bad practice - Comparison of String objects using == or !=
sonar cleanup: according to principle of Litzkow it is better to access propertiers through accessors
added missing braces
Update README

why not use markdown?
Rename README to README.md
Update README.md
sonar cleanup: according to principle of Litzkow it is better to access propertiers through accessors (reverted from commit 1aa6d234fc6329e29e211c31991fe6a2121d115f)
Merge pull request #5 from lkwg82/master

some cleanups according to sonar rules as thank u