Remove module IDs during remove

Fixes #121

pride-core/src/main/java/com/prezi/gradle/pride/config/AbstractConfigurationHandler.java

@@ -54,6 +54,9 @@ public ConfigurationData<M> loadConfiguration(Configuration fileConfiguration) {
 	}
 
 	public void saveConfiguration(Configuration configuration, Collection<M> modules) {
+		for (String moduleKey : Iterators.toArray(configuration.getKeys(MODULES_KEY), String.class)) {
+			configuration.clearProperty(moduleKey);
+		}
 		int id = 0;
 		for (M module : modules) {
 			String moduleId = MODULES_KEY + "." + id;

pride-test/build.gradle

@@ -41,13 +41,13 @@ project(':git-module').projectDir = file('git-module')
 		assert rawContents("$dir/.pride/version", "#") == """
 0
 """
-		assert rawContents("$dir/.pride/config", "#") == """
+		assert asProps(file("$dir/.pride/config")) == asProps("""
 gradle.version = 2.0
 modules.0.name = file-module
 modules.0.vcs = file
 modules.1.name = git-module
 modules.1.vcs = git
-"""
+""")
 		assert rawContents("$dir/.pride/projects", "#") == """
 com.example.test.file:file-module::file-module
 com.example.test.git:git-module::git-module
@@ -56,7 +56,7 @@ com.example.test.git:git-module::git-module
 		def exportFile = file("$temporaryDir/export.pride")
 		pride(dir, "export", "--output", exportFile, "-O")
 
-		assert rawContents(exportFile, "#") == """
+		assert asProps(exportFile) == asProps("""
 gradle.version = 2.0
 modules.0.name = file-module
 modules.0.vcs = file
@@ -66,6 +66,20 @@ modules.0.remote = ${dir}/file-module
 modules.0.revision = none
 modules.1.remote = [email protected]:prezi/test
 modules.1.revision = master
+""")
+
+		pride(dir, "remove", "file-module")
+		assert rawContents("$dir/settings.gradle", "//") == """
+include 'git-module'
+project(':git-module').projectDir = file('git-module')
+"""
+		assert asProps(file("$dir/.pride/config")) == asProps("""
+gradle.version = 2.0
+modules.0.name = git-module
+modules.0.vcs = git
+""")
+		assert rawContents("$dir/.pride/projects", "#") == """
+com.example.test.git:git-module::git-module
 """
 	}
 }
@@ -152,3 +166,17 @@ def copyTest(Task task, String name, Map filters = [:]) {
 def rawContents(Object f, String comment) {
 	"\n" + file(f).text.split("\n").findAll { !it.isEmpty() && !it.startsWith(comment) }.join("\n") + "\n"
 }
+
+def asProps(String contents) {
+	def props = new Properties()
+	props.load(new StringReader(contents))
+	return props
+}
+
+def asProps(File f) {
+	def props = new Properties()
+	f.withInputStream {
+		props.load(it)
+	}
+	return props
+}