Now displays the actual original message, as well as the message in webdriverjs
bumped version tp v0.7.13
Merge pull request #87 from mokkabonna/better-errormessages

Now displays the actual original message, as well as the message in webdriverjs
fixed call command (stalled the execution process) - closes #85
add simple execute test
add pure function execution in .execute

As seen in original webdriverJS:
https://code.google.com/p/selenium/source/browse/javascript/webdriver/webdriver.js#411
forgiving args parameters in execute.js
Add .timeouts, Add .executeAsync

Added timeouts and execute_async selenium commands.

execute_async default timeout seems to be very very low (maybe 0ms?)
Added close.js to commands

This allows to close the browser window.
save error screenshot at path, given by screenshotPath option - refs #89
added option in README.md for documentation - refs #89
add option to disable saving an error screenshot - refs #89
minor readme.md formatting
replaced setTimeout with process.nextTick - refs #85
added DELETE http-verb for window protocol command - refs #96
added actual close command, extended README - refs #96
fixed bug: if screenshotPath is undefined, saveErrorScreenshot() would break command chain
print out a special error message if driver has no correspond ID to a view
added commands for tab handling
fixed protocol command names