Merge pull request #1 from nickl-/upgrade_bsh3.0

Upgrade compatible with latest Beanshell source.

fixed bug with not being able to read if-else statements and do-while loops

junit test for the linter

added detection of missing double quotes

updated parsing of errors and refactored methods to be static

refactored lexing and syntax analysis

added using of parser to check method lines

added ignore file

working lexer

initialize repo