fixed the execution/display of specifications so that the text appears as soon as a fragment has been executed
added a random option to execute examples sequentially but in random order
added an executor argument to change the execution model from the command line
fixed the forms link in the quick start page
using effectively in mutable.Around to avoid having to think about it
removed the part about needing to use effectively in a mutable.Around
small matcher macro refactoring
fixed the Try Matcher. fixes #199
change the creation of stopOnFail steps. fixes #198

this is a breaking change but it is necessary in order to avoid Step
taking a boolean value being executed at construction time
updated the website for posting instantiation issues
merged the recent fixes
refactoring preparing #201
generalised value checks to Option, Try and Either matchers. fixes #201