Fixed submodule URLs

- Turned submodule URLs into HTTPS URLs
- Added cpptoml to IDE
- Fixed up README

Author: Coffee2CodeNL

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "libs/cxxopts"]
 	path = libs/cxxopts
-	url = git@github.com:jarro2783/cxxopts.git
+	url = https://github.com/jarro2783/cxxopts
 [submodule "libs/cpptoml"]
 	path = libs/cpptoml
-	url = git@github.com:skystrife/cpptoml.git
+	url = https://github.com/skystrife/cpptoml

.idea/vcs.xml

@@ -18,7 +18,7 @@ This is more stable, faster, and more efficient as it **does not parse the outpu
 
 ### How to build and install
 
-1. Clone the repository
+1. Clone the repository via `git clone https://github.com/Coffee2CodeNL/gebaar-libinput`
 2. Check out the latest version (`git checkout v0.0.1`)
 3. Run `git submodule update --init` in the root folder
 4. Run `mkdir build && cd build`