Use version based dependencies for openssl/libevent/libev.

dub.json

@@ -1,4 +1,4 @@
-{
+{
 	"name": "vibe-d",
 	"description": "Asynchronous I/O framework",
 	"license": "MIT",
@@ -13,7 +13,7 @@
 
 	"systemDependencies": "libevent 2.0.x or libev, OpenSSL 0.9.x or 1.0.x",
 	"dependencies": {
-		"openssl": "~master"
+		"openssl": "1.0.0+1.0.0e"
 	},
 
 	"targetType": "library",
@@ -24,11 +24,11 @@
 	"sourceFiles-windows-x86" : ["lib/win-i386/eay.lib", "lib/win-i386/ssl.lib"],
 	"copyFiles-windows-x86_64": ["lib/win-amd64/libeay32.dll", "lib/win-amd64/ssleay32.dll"],
 	"sourceFiles-windows-x86_64" : ["lib/win-amd64/libeay32.lib", "lib/win-amd64/ssleay32.lib"],
-	
+
 	"configurations": [
 		{
 			"name": "libevent",
-			"dependencies": {"libevent": "~master"},
+			"dependencies": {"libevent": "~>2.0.1+2.0.16"},
 			"versions": ["VibeLibeventDriver"],
 			"sourceFiles-windows-x86": ["lib/win-i386/event2.lib"],
 			"copyFiles-windows-x86": ["lib/win-i386/libevent.dll"],
@@ -38,7 +38,7 @@
 		},
 		{
 			"name": "libev",
-			"dependencies": {"libev": "~master"},
+			"dependencies": {"libev": "~>4.0.0+4.04"},
 			"platforms": ["posix"],
 			"versions": ["VibeLibevDriver", "LIBEV4"],
 		},