add a function to get a corresponding level from a string
add a field for the verbose level in properties
create a class to store settings of analyzser
update .gitignore to ignore properties files
update .gitignore to ignore properties files
create a sample properties file
[bug fix] a bug that cannot load the version control system was fixed
[bug fix] a bug that cannot load threads count from given arguments was fixed
create a test case for AnalyzerSettings