Fix maven URL and dependencies.

Accessing 'repo' is bad practice and disabled in newer artifactory
versions (like the one we just deployed). Rely on releases instead.

Also, the identd plugin was depending on the wrong parser, and
was presumably pulling in criminally old versions from artifactory.

build.gradle

 
     repositories {
         mavenCentral()
-        maven { url 'https://artifactory.dmdirc.com/artifactory/repo' }
+        maven { url 'https://artifactory.dmdirc.com/artifactory/releases' }
         maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
     }
 

identd/build.gradle

 dependencies {
-    compile group: 'com.dmdirc.parser', name: 'irc', version: '+', changing: true
+    compile group: 'com.dmdirc', name: 'parser-irc', version: '+', changing: true
 }