updated gitignore and requirements

.gitignore

+notes/
+snippets/
 make_output.txt
 *.org~
 *.so

requirements.txt

@@ -8,6 +8,7 @@ clang==6.0.0.2
 cycler==0.10.0
 decorator==4.4.1
 docutils==0.15.2
+h5py==2.10.0
 hawkmoth==0.4
 idna==2.8
 imagesize==1.1.0