update cli to reuse nst modules
removed error from support modules

If module was initialized with
updated docs
added password timeout to file crypt & updated tests
updated error message & docs
added upload progress callback as class attributes
separated uploader into package
fixed uploader imports
updated api docs
fixed typo
added 30 sec timeout for password timer
code comments
updated dependencies
initial pycryto  signing support
removed rsa dependency, using pycrpto instead

added more tests
updated change log & key_handler typo
Merge branch 'dev-pycrpto' into dev
Merge branch 'dev'