fix error response from watson server

When there is an error from Watson server, the error is saved to file content making file corrupt. This fix will read the content of the file if the file size is less than 1000 bytes and return the error message if found in the content of the file.

updated languages and voices

v1.4

initial commit

updated doc

v1.3

initial commit

fix file output

v1.2

initial commit

fix file save

v1.1

initial commit

Initial release in dev

v1.0

initial commit