Split up into modules and add float module

Split the app/ module into three modules

terminal/ - Terminal emulator library module.
view/ - Terminal view library module (depending on terminal/).
app/ - The main Termux app (depending on view/).

Also add the

float/ - The Termux:Float app (depending on view/).

float/build.gradle

@@ -0,0 +1,37 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion "25.0.2"
+
+    dependencies {
+        compile 'com.android.support:support-annotations:25.3.1'
+        compile project(":view")
+    }
+
+    defaultConfig {
+        applicationId "com.termux.window"
+        minSdkVersion 21
+        targetSdkVersion 25
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:25.3.1'
+    testCompile 'junit:junit:4.12'
+}