LogParser can accept directories, now

If it encounters a directory in the argument list, it will recursively
go through the files in it and parse them. (no tests for this use-case)

lib/request_log_analyzer/source/log_parser.rb

@@ -121,7 +121,9 @@ def parse_file(file, options = {}, &block)
       @current_source = File.expand_path(file)
       @source_changes_handler.call(:started, @current_source) if @source_changes_handler
 
-      if decompress_file?(file).empty?
+      if File.directory?(@current_source)
+        parse_files(Dir["#{ @current_source }/*"], options, &block)
+      elsif decompress_file?(file).empty?
 
         @progress_handler = @dormant_progress_handler
         @progress_handler.call(:started, file) if @progress_handler