Add android-lockpattern library

.gitmodules

@@ -34,3 +34,6 @@
 [submodule "extern/safeslinger-exchange"]
 	path = extern/safeslinger-exchange
 	url = https://github.com/open-keychain/exchange-android
+[submodule "extern/android-lockpattern"]
+	path = extern/android-lockpattern
+	url = https://github.com/open-keychain/android-lockpattern.git

OpenKeychain/build.gradle

@@ -20,6 +20,7 @@ dependencies {
     compile project(':extern:KeybaseLib:Lib')
     compile project(':extern:TokenAutoComplete:library')
     compile project(':extern:safeslinger-exchange')
+    compile project(':extern:android-lockpattern:code')
 }
 
 android {

settings.gradle

@@ -14,4 +14,5 @@ include ':extern:minidns'
 include ':extern:KeybaseLib:Lib'
 include ':extern:TokenAutoComplete:library'
 include ':extern:safeslinger-exchange'
+include ':extern:android-lockpattern:code'
 include ':OpenKeychain-Test'