Readme.md in parallel_tests-2.0.0 vs Readme.md in parallel_tests-2.1.0

@@ -203,10 +203,12 @@
         --non-parallel               execute same commands but do not in parallel, needs --exec
         --no-symlinks                Do not traverse symbolic links to find test files
         --ignore-tags [PATTERN]      When counting steps ignore scenarios with tags that match this pattern
         --nice                       execute test commands with low priority.
         --runtime-log [PATH]         Location of previously recorded test runtimes
+        --allowed-missing            Allowed percentage of missing runtimes (default = 50)
+        --unknown-runtime [FLOAT]    Use given number as unknown runtime (otherwise use average time)
         --verbose                    Print more output
     -v, --version                    Show Version
     -h, --help                       Show this.
 
 You can run any kind of code in parallel with -e / --exec
@@ -324,9 +326,10 @@
  - [Aaron Jensen](https://github.com/aaronjensen)
  - [Ed Slocomb](https://github.com/edslocomb)
  - [Cezary Baginski](https://github.com/e2)
  - [Marius Ioana](https://github.com/mariusioana)
  - [Lukas Oberhuber](https://github.com/lukaso)
+ - [Ryan Zhang](https://github.com/ryanus)
 
 
 [Michael Grosser](http://grosser.it)<br/>
 [e-mail]<br/>
 License: MIT