Feature: Wallet compatibility with official steem Python library

[economicstudio]

While I really enjoy beem library (thanks a lot for developing/maintaining!), sometimes I still hope to use official Steem Python library together: https://github.com/steemit/steem-python

While the wallet is actually compatible, there is no feature such that users can use one shared wallet. Or at least import the wallet (just in case the steem wallet is deleted).

One workaround is to create a symbolic link, which seems working to me.

If you don't have a plan to use a different wallet system in near future, it'd be great if the shared-wallet feature is available.

If you like, I'll make a PR. (My plan is to detect steempy wallet and then ask users to choose.)