change images addresses in readme again

README.md

@@ -33,19 +33,19 @@ There are basically two ways to use R package checker :
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 **Bash script output :**
 
-![screenshot bash](https://gitlab.mbb.univ-montp2.fr/julien/r-package-checker/raw/master/screenshots/rcheck_bash.png)
+![screenshot bash](http://gitlab.mbb.univ-montp2.fr/julien/r-package-checker/raw/master/screenshots/rcheck_bash.png)
 
 ---
 
 **Simple web interface example with 3 parallel processes :**
 
-![screenshot web](https://gitlab.mbb.univ-montp2.fr/julien/r-package-checker/raw/master/screenshots/rcheck_web.png)
+![screenshot web](http://gitlab.mbb.univ-montp2.fr/julien/r-package-checker/raw/master/screenshots/rcheck_web.png)
 
 ---
 
 **Something went wrong in plotKML check procedure :**
 
-![screenshot web problem](https://gitlab.mbb.univ-montp2.fr/julien/r-package-checker/raw/master/screenshots/rcheck_web_problem.png)
+![screenshot web problem](http://gitlab.mbb.univ-montp2.fr/julien/r-package-checker/raw/master/screenshots/rcheck_web_problem.png)
 
 # Requirements
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