rearranged folder and package structure; added web ui template

pom.xml

src/main/java/de/deadlocker8/budgetmaster/Main.java

.../deadlocker8/budgetmaster/controller/IndexController.java

.../deadlocker8/budgetmaster/controller/LoginController.java

src/main/resources/application.properties

src/main/resources/de/deadlocker8/budgetmaster/icon.png

src/main/resources/languages/_de.properties

src/main/resources/languages/_en.properties

src/main/resources/static/css/login.css

src/main/resources/static/css/main.css

src/main/resources/static/css/style.css

src/main/resources/static/images/Logo.png

src/main/resources/static/images/Logo_with_text.png

src/main/resources/static/js/main.js

src/main/resources/templates/index.ftl

src/main/resources/templates/login.ftl