Added/improved Javadocs.

Added copyright headers to property files.
Removed unused artifacts.

Author: atsticks

src/main/java/javax/money/AbstractContext.java

@@ -15,7 +15,7 @@
 import java.util.Set;
 
 /**
- * This class models a context. Such a context allows to define extendible and
+ * This class models an abstract context that allows to define extendible and
  * portable contexts with any kind of attributes in a type safe way.
  * <p>
  * Instances of this class should be immutable and thread-safe.

src/main/java/javax/money/CurrencySupplier.java

@@ -32,9 +32,9 @@
 public interface CurrencySupplier {
 
 	/**
-	 * Gets a result.
+	 * Gets the corresponding {@link javax.money.CurrencyUnit}.
 	 * 
-	 * @return a result
+	 * @return the corresponding {@link javax.money.CurrencyUnit}, not null.
 	 */
 	CurrencyUnit getCurrency();
 }