Fix some typos, improve some descriptions

_data/contribute.json

@@ -1,21 +1,21 @@
 [{
 	"title": "Fork and code",
 	"icon": "code-fork",
-	"description": "We're happy about every new feature that someone brings to Vocaluxe. So why don't you just start coding?",
-	"url_text": "HowTo build on windows",
+	"description": "Vocaluxe is free and open source software. We're happy about every new feature that someone brings to Vocaluxe. So why don't you just start coding?",
+	"url_text": "How to build on Windows",
 	"url": "https://github.com/Vocaluxe/Vocaluxe/wiki/HowTo:-Build-Vocaluxe-(Windows)"
 },
 {
 	"title": "Translate",
 	"icon": "globe",
-	"description": "Want to help by translating Vocaluxe into you native language? Or want to improve an existing one?",
+	"description": "Want to help by translating Vocaluxe into your native language or by improving an existing translation?",
 	"url_text": "Start here",
 	"url": "https://www.transifex.com/darkice/vocaluxe/"
 },
 {
-	"title": "Find bugs",
+	"title": "Report bugs",
 	"icon": "bug",
-	"description": "Help us to keep Vocaluxe stable. If you find a bug, just open an issue in our GitHub issue tracker.",
+	"description": "Help us keep Vocaluxe stable. If you find a bug, just open an issue in our GitHub issue tracker.",
 	"url_text": "Open an issue",
 	"url": "https://github.com/Vocaluxe/Vocaluxe/issues"
 }]