Add requirements.txt

Add requirements.txt for pip install
Update mbtrack2.yml to add accelerator-toolbox dependency for lattice import

__init__.py

 # -*- coding: utf-8 -*-
+from mbtrack2.tracking import *
+from mbtrack2.impedance import *
+from mbtrack2.instability import *
+from mbtrack2.utilities import *
\ No newline at end of file

mbtrack2.yml

@@ -9,4 +9,7 @@ dependencies:
   - matplotlib
   - seaborn
   - mpmath
-  - ipykernel
\ No newline at end of file
+  - ipykernel
+  - pip
+  - pip: 
+    - accelerator-toolbox
\ No newline at end of file

requirements.txt

+numpy
+pandas
+scipy
+h5py
+mpi4py
+matplotlib
+seaborn
+mpmath
+ipykernel
\ No newline at end of file