java: Changed size_t and unsigned int to int in array declarations. Renamed buf to buffer where necesarry. Moved most Java array typemaps to java_buffer.i. Fixed some String buffers.

Signed-off-by: Petre Eftime <petre.p.eftime@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

Conflicts:
	src/upm.i

src/grovescam/grovescam.h

@@ -117,7 +117,7 @@ namespace upm {
      * @param len Length of the buffer
      * @return Number of bytes read
      */
-    int readData(uint8_t *buffer, size_t len);
+    int readData(uint8_t *buffer, int len);
 
     /**
      * Writes the data in the buffer to the device
@@ -126,7 +126,7 @@ namespace upm {
      * @param len Length of the buffer
      * @return Number of bytes written
      */
-    int writeData(uint8_t *buffer, size_t len);
+    int writeData(uint8_t *buffer, int len);
 
     /**
      * Sets up proper tty I/O modes and the baud rate. For this device, the default