Print out the number of specs checked
Default to running all ./*-spec.io files
"a verify(== b)" prints values of a and b
Adding support for testing multiple specs at once
Making the specs executable
To use the executable scripts, first the iospec script must be copied
onto the $PATH.
Changing 'args' to 'System args'
Io no longer has the global variable args with a list of command line arguments.
Now 'System args' must be used.
Removing duplicate WebUser tests
Moved examples into the example folder
Renaming spec.io to iospec
Support nested describes
Adding setup and teardown methods
Record exceptions and report errors at end
Executes test bodies