Issue #3 fixed and JsonAssert simplified

Conflicts:
	json-unit-core/src/main/java/net/javacrumbs/jsonunit/core/internal/Diff.java
	json-unit-core/src/main/java/net/javacrumbs/jsonunit/core/internal/JsonUtils.java
	json-unit-core/src/test/java/net/javacrumbs/jsonunit/core/internal/DiffTest.java
	json-unit-fluent/src/main/java/net/javacrumbs/jsonunit/fluent/JsonAssert.java
	json-unit-fluent/src/main/java/net/javacrumbs/jsonunit/fluent/JsonFluentAssert.java
	json-unit-fluent/src/test/java/net/javacrumbs/jsonunit/fluent/JsonFluentAssertTest.java
	json-unit/src/main/java/net/javacrumbs/jsonunit/JsonAssert.java
	json-unit/src/main/java/net/javacrumbs/jsonunit/JsonMatchers.java
	json-unit/src/test/java/net/javacrumbs/jsonunit/JsonAssertTest.java