Removed poms & jinput optional dependency

Cleared away older traces of Maven and Ant, to embrace the new Gradle
situation.

Removed JInput, since it brought in additional native efforts and was
not (as far as I know) being used.

Added IntelliJ-related exclusions to .gitignore.

.gitignore

@@ -3,6 +3,11 @@ deploy/
 target/
 log/
 
+# IntelliJ
+.idea/
+*.iml
+out/
+
 # Gradle
 build/
 .gradle/

build.gradle

@@ -54,7 +54,6 @@ subprojects {
     opencv
     jpen
     imagej
-    jinput
     openslide
   }
 
@@ -85,7 +84,6 @@ subprojects {
     if (nativesClassifier != null)
       jpen 'net.sourceforge.jpen:jpen:2-150301:' + nativesClassifier
     imagej 'net.imagej:ij:1.51s'
-    jinput 'net.java.jinput:jinput:2.0.6'
     openslide 'org.openslide:openslide:3.4.1_2'
     if (nativesClassifier != null)
       openslide 'org.openslide:openslide:3.4.1_2:' + nativesClassifier
@@ -130,7 +128,6 @@ dependencies {
     compile project(':qupath-gui-fx')
     compile project(':qupath-extension-opencv')
     compile project(':qupath-extension-ij')
-    compile project(':qupath-extension-input')
     compile project(':qupath-extension-openslide')
     compile project(':qupath-extension-pen')
     compile project(':qupath-extension-script-editor')