Moving VERSION.txt to qiskit so it can be part of the wheel package (#598)

* Moving VERSION.txt to qiskit so it can be part of the wheel package

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required (VERSION 3.5 FATAL_ERROR)
-file(STRINGS "VERSION.txt" VERSION_NUM)
+file(STRINGS "qiskit/VERSION.txt" VERSION_NUM)
 project (QISKit VERSION ${VERSION_NUM} LANGUAGES CXX)
 
 # Verbose!!

MANIFEST.in

@@ -3,7 +3,7 @@ recursive-include src/qasm-simulator-cpp *
 include qiskit/backends/local/qasm_simulator_cpp
 include qiskit/backends/local/qasm_simulator_cpp.exe
 include qiskit/backends/local/*.dll
-include VERSION.txt
+include qiskit/VERSION.txt
 include CMakeLists.txt
 include cmake/*.cmake
 include setup.py.in

qiskit/__init__.py

@@ -43,6 +43,6 @@ from . import wrapper
 
 import os
 
-ROOT_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), "..")
+ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
 with open(os.path.join(ROOT_DIR, "VERSION.txt"), "r") as version_file:
-    __version__ = version_file.readlines()
+    __version__ = version_file.read().strip()