arc/cli/app.py: remove interpreter

Since this is not intended to be an executable script

Signed-off-by: Cleber Rosa <crosa@redhat.com>
arc/connection.py: syntax fix for Python 3

Signed-off-by: Cleber Rosa <crosa@redhat.com>
scripts/arcli: replaced interpreter path

As suggested by Fedora package review

Signed-off-by: Cleber Rosa <crosa@redhat.com>
arc: replace jsonrpc module for new proxy module

The new module is new code (of course influenced by the already
modified jsonrpc module), but it's more modular and fits better
with the arc style.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Updated README.md to reflect newer releases

Signed-off-by: Cleber Rosa <crosa@redhat.com>
python-arc.spec: followed suggestions from Fedora package review

Signed-off-by: Cleber Rosa <crosa@redhat.com>
releae: bump version to 0.3.0

Signed-off-by: Cleber Rosa <crosa@redhat.com>