Added additional escape sequences defined in ECMA-48.

Adds:

* cursorToColumn: Absolute columar positioning of the cursor,
* cursorUpLine: Move the cursor up one or more lines, and move it to the
  beginning of the line.
* cursorDownLine: Move the cursor down one or more lines, and move it to the
  beginning of the line.

jansi/src/main/java/org/fusesource/jansi/Ansi.java

@@ -217,6 +217,11 @@ public Ansi cursor(int x, int y) {
             return this;
         }
 
+        @Override
+        public Ansi cursorToColumn(int x) {
+            return this;
+        }
+
         @Override
         public Ansi cursorUp(int y) {
             return this;
@@ -237,6 +242,26 @@ public Ansi cursorLeft(int x) {
             return this;
         }
 
+        @Override
+        public Ansi cursorDownLine() {
+            return this;
+        }
+
+        @Override
+        public Ansi cursorDownLine(final int n) {
+            return this;
+        }
+
+        @Override
+        public Ansi cursorUpLine() {
+            return this;
+        }
+
+        @Override
+        public Ansi cursorUpLine(final int n) {
+            return this;
+        }
+
         @Override
         public Ansi eraseScreen() {
             return this;
@@ -339,6 +364,10 @@ public Ansi cursor(final int x, final int y) {
 		return appendEscapeSequence('H', x, y);
 	}
 
+    public Ansi cursorToColumn(final int x) {
+        return appendEscapeSequence('G', x);
+    }
+
 	public Ansi cursorUp(final int y) {
 		return appendEscapeSequence('A', y);
 	}
@@ -355,6 +384,22 @@ public Ansi cursorLeft(final int x) {
 		return appendEscapeSequence('D', x);
 	}
 
+    public Ansi cursorDownLine() {
+        return appendEscapeSequence('E');
+    }
+
+    public Ansi cursorDownLine(final int n) {
+        return appendEscapeSequence('E', n);
+    }
+
+    public Ansi cursorUpLine() {
+        return appendEscapeSequence('F');
+    }
+
+    public Ansi cursorUpLine(final int n) {
+        return appendEscapeSequence('F', n);
+    }
+
 	public Ansi eraseScreen() {
 		return appendEscapeSequence('J',Erase.ALL.value());
 	}