Rename fix python/integrate to python/move

This is to avoid confusion to what LAMMPS considers to be an
integrator like Verlet and RESPA.

examples/python/README.fix_python_move

@@ -1,15 +1,16 @@
 This folder contains several LAMMPS input scripts and a python module
-file py_integrate.py to demonstrate the use of the fix style python/integrate.
+file py_nve.py to demonstrate the use of the fix style python/move
+to reimplement NVE using Python.
 
-in.fix_python_integrate_melt:
+in.fix_python_nve_melt:
 This is a version of the melt example which replaces the default NVE integrator
-with a Python implementation. Fix python/integrate is used to create an
-instance of the py_integrate.NVE class which implements the required interface.
+with a Python implementation. Fix python/move is used to create an
+instance of the py_nve.NVE class which implements the required interface.
 It demonstrates how to access LAMMPS data as numpy arrays. This gives direct
 access to memory owned by the C++ code, allows easy manipulation through numpy
 operations and avoids unnecessary copies.
 
-in.fix_python_integrate_melt_opt:
+in.fix_python_nve_melt_opt:
 This version of melt example uses NVE_Opt instead of NVE. While this Python
 implementation is still much slower than the native version, it shows that
 simple code transformations can lead to speedups.

examples/python/in.fix_python_nve_melt

@@ -17,7 +17,7 @@ pair_coeff	1 1 1.0 1.0 2.5
 neighbor	0.3 bin
 neigh_modify	every 20 delay 0 check no
 
-fix		1 all python/integrate py_integrate.NVE
+fix		1 all python/move py_nve.NVE
 
 thermo		50
 run		250

examples/python/in.fix_python_nve_melt_opt

@@ -17,7 +17,7 @@ pair_coeff	1 1 1.0 1.0 2.5
 neighbor	0.3 bin
 neigh_modify	every 20 delay 0 check no
 
-fix		1 all python/integrate py_integrate.NVE_Opt
+fix		1 all python/move py_nve.NVE_Opt
 
 thermo		50
 run		250

examples/python/py_nve.py

@@ -9,9 +9,9 @@ class LAMMPSFix(object):
         self.lmp = lammps.lammps(ptr=ptr)
         self.group_name = group_name
 
-class LAMMPSIntegrator(LAMMPSFix):
+class LAMMPSFixMove(LAMMPSFix):
     def __init__(self, ptr, group_name="all"):
-        super(LAMMPSIntegrator, self).__init__(ptr, group_name)
+        super(LAMMPSFixMove, self).__init__(ptr, group_name)
 
     def init(self):
         pass
@@ -32,7 +32,7 @@ class LAMMPSIntegrator(LAMMPSFix):
         pass
 
 
-class NVE(LAMMPSIntegrator):
+class NVE(LAMMPSFixMove):
     """ Python implementation of fix/nve """
     def __init__(self, ptr, group_name="all"):
         super(NVE, self).__init__(ptr)
@@ -70,7 +70,7 @@ class NVE(LAMMPSIntegrator):
             v[i,:] += dtfm * f[i,:]
 
 
-class NVE_Opt(LAMMPSIntegrator):
+class NVE_Opt(LAMMPSFixMove):
     """ Performance-optimized Python implementation of fix/nve """
     def __init__(self, ptr, group_name="all"):
         super(NVE_Opt, self).__init__(ptr)