message: Add more details about signature help and tests codelenses
diff: @@ -28,7 +28,8 @@ The easist way to verify that a project was successfully loaded is to open a .cs
  #### Signature Help
  * Signature Help shows up in a method call after typing `(`
  -* Signature help shows documentation for methods and for parameters
  +* Signature help shows documentation for methods and for
  +* Parameter documentation is only shown for the currently active parameter
  #### Quick Info
  * Hovering over an identifier shows info and documentation
  @@ -76,6 +77,9 @@ The easist way to verify that a project was successfully loaded is to open a .cs
  * In unit tests projects, the "run test" and "debug test" codelens appears on test methods
  * Clicking runs or debugs the test and prints results to the console
  * Breakpoints in a unit test are hit if you "debug test"
  +* "Run All Tests" and "Debug All Tests" code lens buttons will appear on test classes
  + * Click Run All or Debug All should run/debug all the tests in the class and print a summary
  + * If you set breakpoints within multiple tests, you should hit each breakpoint as the tests are run
  #### Symbol Finder
  * Ctrl-T can find symbols by name when you type them
  