Throw error if a user tries to call a function with non-initialized peer

[coder11]

If a user tries execute a particle on non-initiated peer the execution will hang silently. Some examples on when it happens:

1. A user forgets to pass the FluencePeer and doesn't have default peer initialized
2. A user just forgets to initialize the default peer
3. A user passes uninitialized FluencePeer

A good user-friendly error message should be thrown instead according to the current peer status

[folex]

related: fluencelabs/aqua#317