Set base path to cwd when vicotool starts Vico from scratch.

If Vico is already running, we don't do anything to the base path vico
is looking at; however, if Vico is actually started up by vicotool, the
base path is set to the current working directory that vicotool was
started in.
Always set base path to cwd when vicotool starts Vico.

Before we were only doing it if we were pointed to a specific
file, now running vicotool from a directory with no further
parameters will set the base path to cwd.
Merge pull request #35 from vicoapp/pwd-as-base-path-in-vicotool

Always set base path to cwd when vicotool starts Vico from scratch.

If Vico is already running, we don't do anything to the base path vico
is looking at; however, if Vico is actually started up by vicotool, the
base path is set to the current working directory that vicotool was
started in.