chg: Add default & tested requirements

requirements.txt

@@ -0,0 +1,18 @@
+-i https://pypi.org/simple
+-e .
+-e git+https://github.com/grierforensics/officedissector.git@2059a5ba08fa139362e3936578f99c4da9a9b55d#egg=officedissector
+asn1crypto==0.24.0
+cffi==1.12.3
+colorclass==2.2.0
+cryptography==2.7
+easygui==0.98.1
+exifread==2.1.2
+lxml==4.4.1
+msoffcrypto-tool==4.10.1
+olefile==0.46
+oletools==0.54.2
+pillow==6.1.0
+pycparser==2.19
+pyparsing==2.4.2
+python-magic==0.4.15
+six==1.12.0