Merge pull request #2 from Qiskit/master

Fix chemistry renos and move 0.8 renos to a subfolder (qiskit-community#1369)

Author: paulineollitrault

releasenotes/notes/P_BFGS-MacOS-4013becffcdf435a.yaml renamed to releasenotes/notes/0.8/P_BFGS-MacOS-4013becffcdf435a.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    A new algorithm has been added: the Born Openheimer Potential Energy surface for the 
+    calculation of potential energy surface along different degrees of freedom of the molecule. 
+    The algorithm is called ``BOPESSampler``. It further provides functionalities of fitting the 
+    potential energy surface to an analytic function of predefined potentials.some details.

releasenotes/notes/UCCSD-excitation-list-0fbb1af60f47192f.yaml renamed to releasenotes/notes/0.8/UCCSD-excitation-list-0fbb1af60f47192f.yaml

@@ -0,0 +1,9 @@
+---
+features:
+  - |
+    In addition to the workflows for solving Fermionic problems, interfaces for calculating
+    Bosonic ground and excited states have been added. In particular we introduced a full 
+    interface for running vibronic structure calculations.
+deprecations:
+  - TransformationType
+  - QubitMappingType

releasenotes/notes/admm-optimizer-d482b33f2474244e.yaml renamed to releasenotes/notes/0.8/admm-optimizer-d482b33f2474244e.yaml

@@ -0,0 +1,14 @@
+---
+features:
+    - |
+      An interface for excited states calculation has been added to the chemistry module.
+      It is now easier for the user to create a general excited states calculation. 
+      This calculation is based on a ``Driver`` which provides the relevant information 
+      about the molecule, a ``Transformation`` which provides the information about the 
+      mapping of the problem into a qubit Hamiltonian, and finally a Solver. 
+      The Solver is the specific way which the excited states calculation is done 
+      (the algorithm). This structure follows the one of the ground state calculations.    
+      The results are modified to take lists of expectation values instead of a single one.
+      The ``QEOM`` and ``NumpyEigensolver`` are adapted to the new structure. 
+      A factory is introduced to run a numpy eigensolver with a specific filter 
+      (to target states of specific symmetries).