fix(PowerSpy): closing connections were missing

There was a problem for closing the connexion. It was not possible to stop completely the PowerSpy and to start it again
(input, output were not closed, and one method in the BluecoveImpl was not called)

chore(build): version, lib folder to replace the bluecove one

Increment the build version (fix a bug), and use directly the lib folder to include the external libraries
fix(PowerSpy): add timeout for closing connections

There was a problem by using the jar created by sbt-native-packager. When using CTRL + C, the Bluecove's stack is stopped just after, before the close methods are called on the input/output/connection. The close methods was blocking.
Merge pull request #3 from Spirals-Team/fix/close-connections

Close input/output/internal connexion