Deletion / text selection control

[anerli]

Currently the agent can inject special sequences and for those respective keys, but there is no way to select text or delete text

    .step('Click in input field "First name"')
        .data('Remove all text from this field')

Need something like , <ctrl+c>, or perhaps just an overhauled/more robust way entirely for the agent to inject specific keypresses in between normal text content

[anerli]

related to #22

[anerli]

Agent now has much better keyboard control as of 0.2.5 - with ability to press enter/tab/backspace and select all