README.md: use https for URLs, except for sgnlr.com where it doesn't work

diff --git a/README.md b/README.md
index 91a991d..9f978a7 100644 (file)
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ more bike lanes) than to build an actual product.
 The prototype has been developed on a BeagleBone Black.
 
 A keypad is needed to adjust the perspective projection parameters, see
-http://ao2.it/137 for instructions about how a device-tree overlay can be used
+https://ao2.it/137 for instructions about how a device-tree overlay can be used
 for that.
 
 A precise rotary encoder is needed to detect movement at very low speed,
@@ -59,7 +59,7 @@ with the mouse wheel, with the following command:
 much in the spirit of Cyclabile.
 
 * <http://sgnlr.com/works/outside/safety-first2011-prague/>
-* <http://vimeo.com/23469752>
+* <https://vimeo.com/23469752>
 
 The difference is that Cyclabile is more portable and more interactive, the bike
 lane moves depending on the bike movement while "*Safety First*" used a video
@@ -72,8 +72,8 @@ This is more generic, it's used to display info on the road, not specifically
 a bike lane.
 
 * <https://makezine.com/bike-projector-heads-down-display-stationary/>
-* <http://www.reddit.com/r/technology/comments/1anmip/guy_builds_a_speedometer_built_from_a_raspberry/>
-* <http://www.youtube.com/watch?v=Nfk1-XMASrk>
+* <https://www.reddit.com/r/technology/comments/1anmip/guy_builds_a_speedometer_built_from_a_raspberry/>
+* <https://www.youtube.com/watch?v=Nfk1-XMASrk>
 
 
 ### Lightlane