Fix issue #541 - error if no value in textarea
Added source maps
Point devs to the repository for the docs, too.
Merge pull request #604 from toolness/patch-1

Point devs to the repository for the docs, too.
Merge pull request #601 from jlaverty/Issue#449

Added source maps
Merge pull request #553 from alicoding/issue541

Fix issue #541 - error if no value in textarea
storage module
tests
storage unit tests
cleanup
add error callbacks
error messages