Simplify .gitignore and remove ide project files

.gitignore

@@ -1,48 +1,3 @@
-# Package Files #
+.idea/
-*.jar
+*.iml
-*.war
-*.ear
-
-# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
-hs_err_pid*
-
-# maven build outputs
 target/
-
-# netbeans legacy
-nbproject/
-nbactions.xml
-
-# eclipse legacy
-.project
-
-# intellij
-.idea/libraries/
-.idea/workspace.xml
-.idea/uiDesigner.xml
-.idea/compiler.xml
-.idea/misc.xml
-.idea/checkstyle.xml
-.idea/artifacts/
-.idea/dataSources*
-.idea/tasks.xml
-.idea/dictionaries/
-.idea/shelf/
-.idea/dynamic.xml
-.idea/sqlDataSources.xml
-.idea/gradle.xml
-.idea/mongoSettings.xml
-
-# Spring
-spring.log
-logs/
-/application.properties
-/bootstrap.properties
-
-# Composer-style
-vendor
-
-# Git and temp files
-*.orig
-*.patch
-*~