reimplemented parallel javacc lexer using messages and blocking queue
Merge branch 'feature/concurrent-parser' of https://github.com/klinovp/elk into feature/concurrent-parser
taken ConcurrentJavaCCLexer from the inner class;
parser and lexer threads are now deamon
added a name to the timer thread
Intellij idea files are added to .gitignore
next lexer batch cannot be null
Merge branch 'master' into feature/concurrent-parser