pkg/isolate: library renaming, removed unused method, fix creation of TimeoutException

README.md

 # isolate
 
 The `isolate` package helps with isolates and isolate communication.
 
 The package contains individual libraries with different purposes.
 
 ### Creating send ports and responding to messages.
 
 The "ports.dart" sub-library contains functionality
 for creating `SendPort`s and reacting to values sent to those ports.
 
 ### Working with isolates and running functions in other isolates.
 
-The "isolaterunner.dart" sub-library introduces an `IsolateRunner` class
+The "isolate_runner.dart" sub-library introduces an `IsolateRunner` class

[Lasse Reichstein Nielsen, 2015/03/24 10:35:38]

Aw, man!
What is it with people and underscores? Do you LIKE to write them?

[kevmoo, 2015/03/24 13:21:19]

We go with "_" because it's a valid in dart identifiers. We can't have a library
my-library.

We also like having file names tightly align with library names.

So sticking with a convention around "_" as the separator in all dart files
easier.

I like consistency.

 that gives easy access to the `Isolate` functionality, and also
 gives a way to run new functions in the isolate repeatedly, instead of
 just on the initial `spawn` call.
 
 ### A central registry for values that can be used accross isolates.
 
 The "registry.dart" sub-library provides a way to create an
 object registry, and give access to it accross different isolates.
 
 ### Balancing load accross several isolates.
 
-The "loadbalancer.dart" sub-library can manage multiple `Runner` objects,
+The "load_balancer.dart" sub-library can manage multiple `Runner` objects,
 including `IsolateRunner`, and run functions on the currently least loaded
 runner.
 
 ## Features and bugs
 
 Please file feature requests and bugs at the [issue tracker][tracker].
 
 [tracker]: https://github.com/dart-lang/isolate/issues