Adds new splinter methods

- choose: Chooses a radio element by value
- select: Selects an option element from select by value

Upgrades splinter to 0.6.0
Merge pull request #19 from andersonba/new_splinter_methods

Adds new splinter methods
Merge pull request #18 from andersonba/master

New reuse_browser flag
Quit browsers between tests

Before, pyfuct only quits browsers on end of testcase (`tearDownClass`).
This will avoid keep multiple browsers open, that aren't not used.

In case property `reuse_browser` is configured to true, we mantain only
the default browser open and clear his session.
refactor quit browser on tearDown
Merge pull request #20 from rodrigopr/quit_browsers_between_tests

Quit browsers between tests
Adds support for closing a single browser window

without closing the whole driver connection,
which happens on quit calls on splinter driver
Fix typo in exception message
Configure browser by SplinterBrowserDriver __init__
Add unit tests
Merge pull request #22 from andersonba/configure_browser

Configure browser by SplinterBrowserDriver __init__
Merge pull request #21 from rodrigopr/quit_browsers_between_tests

Close browser instead of quit between tests