Add hidden tags option (#212)

* Add filter for hidden tags. (#207)

This commit adds the option to configure hidden tags. Articles tagged
with these hidden tags won't appear in the list of articles by default.
To see these articles the user must explicitly filter by those tags.

* Closes #211. Handling hidden tags in the lateral panel.

* Changelog.

app/build.gradle

@@ -30,16 +30,13 @@ apply plugin: 'kotlin-android'
 
 apply plugin: 'kotlin-android-extensions'
 
-repositories {
-}
-
 android {
     compileOptions {
-        sourceCompatibility 1.8
-        targetCompatibility 1.8
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
-    compileSdkVersion 27
-    buildToolsVersion '27.0.3'
+    compileSdkVersion 28
+    buildToolsVersion '28.0.1'
     defaultConfig {
         applicationId "apps.amine.bou.readerforselfoss"
         minSdkVersion 16
@@ -93,11 +90,8 @@ dependencies {
     androidTestImplementation 'com.android.support.test.espresso:espresso-contrib:3.0.1'
     // Espresso-intents for validation and stubbing of Intents
     androidTestImplementation 'com.android.support.test.espresso:espresso-intents:3.0.1'
-
-
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-
     // Android Support
     implementation 'com.android.support:appcompat-v7:27.1.1'
     implementation 'com.android.support:design:27.1.1'
@@ -143,8 +137,7 @@ dependencies {
 
     // Themes
     implementation 'com.52inc:scoops:1.0.0'
-    implementation'com.jrummyapps:colorpicker:2.1.7'
-
+    implementation 'com.jrummyapps:colorpicker:2.1.7'
     implementation 'com.github.rubensousa:floatingtoolbar:1.5.1'
 
     // Pager
@@ -153,8 +146,8 @@ dependencies {
     implementation 'androidx.core:core-ktx:0.3'
 
     // Crash
-    implementation "ch.acra:acra-http:5.1.3"
-    implementation "ch.acra:acra-dialog:5.1.3"
+    implementation 'ch.acra:acra-http:5.1.3'
+    implementation 'ch.acra:acra-dialog:5.1.3'
 }