Adding size command, for changing window size with width and height.
Change name from size to windowSize for window sizing method.
Bumping version for release
Merge pull request #93 from bernii/master

FIX: racing condition in chain example
Merge pull request #95 from DocuSignDev/master

Adding "size" method for changing window size
Fixed doc comments
add window size setting/getting and test
update mapping and README
update docs and allow default 'current' window for set/get size
update mapping and README with new windowSize doc params
doc mapping fix
README update
test for promisified wd querying for element subelements,
promisify only certain element functions,
fix bugs in promise-test-base:
- use 'done' to allow error to be thrown when assertion fails
- call 'done' of 'it', not 'describe'