Add hash for both sdist and wheel in requirements.txt when both exist.

Which one is chosen is a matter of pip version and flags (thanks Erik!).

requirements.txt

@@ -1,4 +1,5 @@
 # sha256: TIMmzrNyf0_3AR1_Ybe8oVzKGU4iiAE6c9XMr1bToYs
+# sha256: qw84eyiRKsnDANuENGE1nidz2juSKuN4q2mw2Fsojsg
 binaryornot==0.4.0
 
 # sha256: Jo-gDCfedW1xZj3WH3OkqNhydWm7G0dLLOYCBVOCaHI
@@ -22,6 +23,7 @@ elasticsearch==1.6.0
 Flask==0.10.1
 
 # sha256: BK-ioGq33MqdgXF7Qgp6FIJgYemyYUpcd90kx1zPl-Q
+# sha256: L-I0K7T-i44hfw0htZIcvlQIv5Ztn5ICXnB-iBsZi-0
 futures==3.0.3
 
 # sha256: y7P8-NPjPfhhcJ7K-J2eZinP8KIXvChI8bQc0w02BRk
@@ -49,6 +51,7 @@ parsimonious==0.6.2
 pyelasticsearch==1.4
 
 # sha256: SFYCEplJsUJH6LEk0or0ZU3_vQdlN8SpxEpTiiwXVbc
+# sha256: iOTIqRsq9ZYr-l6iRH7G3TVwGOhulMfRS9jKy8W1XYE
 Pygments==2.1.3
 
 # sha256: mEFMy7mQkCOXKZaP5CJaMXPj8OwbteW9dmq9drwZqNk
@@ -69,6 +72,7 @@ tabulate==0.7.5
 urllib3==1.10.4
 
 # sha256: pDiqjD9ROlzz3aAqYvngIrdZjp-_66FLotbdlXyKtDY
+# sha256: nSdx5Mib4Se8S6wFarfOrw4AZMcj1rbhlXOcOvT9XB0
 Werkzeug==0.10.4
 
 # sha256: uyTo_df6vGRca0giqfa20IF1End-YHo_-ko4rSI_kgY