Handle different start and end times of components

• connect and _connect get an argument start_time that is to be passed to try_connect instead of self.time
• Connect helper pushes data twice: once for start_time and once for info.time (if it is not equal to start_time)
• Starting time can be passed to component's run(), and is auto-determined if not provided

Basically, only the changes in interfaces.py, schedule.py, component.py and connect_helper.py are of interest. The rest is fixes for the breaking change to the interface.

Fixes #4 (closed)

docs/source/finam-book/development/adapters.rst

@@ -70,7 +70,7 @@ File ``src/scale.py``:
 
     generator.outputs["Value"] >> adapter >> consumer.inputs["Input"]
 
-    comp.run(datetime(2000, 1, 2))
+    comp.run(t_max=datetime(2000, 1, 2))
 
     print(fm.data.strip_data(consumer.data["Input"]))
 
@@ -244,7 +244,7 @@ In :meth:`.Adapter._get_data`, we can now do the interpolation whenever data is
 
     generator.outputs["Value"] >> adapter >> consumer.inputs["Input"]
 
-    comp.run(datetime(2000, 1, 15))
+    comp.run(t_max=datetime(2000, 1, 15))
 
     print(fm.data.strip_data(consumer.data["Input"]))