Refactor sub budgets

This continues on !152 (merged) in preparing for the merge of super duper dev branches. The noise sub-budgets are moved out of ifo.noises and into the relevant noise modules. This also gets rid of the from noises import * construction in all of the ifo init files.

Over the course of this refactoring, the suspension thermal, residual gas, and seismic sub-budgets are defined with constructors as described by @jameson.rollins in #65 (closed). This isn't sub-budgets at runtime #83, but it's much much better than what we had before. The sub-budgets are also less annoyingly named now, for example SuspensionThermal.HorizPUM instead of SuspensionThermal.SuspensionThermalHorizPUM and Quantum.SEC instead of QuantumVacuum.QuantumVacuumSEC

gwinc/ifo/Aplus/__init__.py

-from gwinc.ifo.noises import *
 from gwinc.ifo import PLOT_STYLE
+from gwinc import noise
+from gwinc import nb
+from gwinc.ifo.noises import Strain
 
 
-class QuantumVacuum(nb.Budget):
+class Quantum(nb.Budget):
     """Quantum Vacuum
 
     """
@@ -12,13 +14,13 @@ class QuantumVacuum(nb.Budget):
     )
 
     noises = [
-        QuantumVacuumAS,
-        QuantumVacuumArm,
-        QuantumVacuumSEC,
-        QuantumVacuumFilterCavity,
-        QuantumVacuumInjection,
-        QuantumVacuumReadout,
-        QuantumVacuumQuadraturePhase,
+        noise.quantum.AS,
+        noise.quantum.Arm,
+        noise.quantum.SEC,
+        noise.quantum.FilterCavity,
+        noise.quantum.Injection,
+        noise.quantum.Readout,
+        noise.quantum.QuadraturePhase,
     ]
 
 
@@ -27,15 +29,15 @@ class Aplus(nb.Budget):
     name = 'A+'
 
     noises = [
-        QuantumVacuum,
-        Seismic,
-        Newtonian,
-        SuspensionThermal,
-        CoatingBrownian,
-        CoatingThermoOptic,
-        SubstrateBrownian,
-        SubstrateThermoElastic,
-        ExcessGas,
+        Quantum,
+        noise.seismic.Seismic,
+        noise.newtonian.Newtonian,
+        noise.suspensionthermal.SuspensionThermal,
+        noise.coatingthermal.CoatingBrownian,
+        noise.coatingthermal.CoatingThermoOptic,
+        noise.substratethermal.SubstrateBrownian,
+        noise.substratethermal.SubstrateThermoElastic,
+        noise.residualgas.ResidualGas,
     ]
 
     calibrations = [