Init commit
Fix bug in AttributeDescriptor#attributeCompare
WSDL processing has been changed.
WSDLProcessor returning some information in addition to TypeDescription set:
 1.) Map( WSDL_Operation->Map(
               "inbound"->WSDL_Message,
               "outbound"->WSDL_Message
        )
    )

 2.) Map( TypeDescriptor->List(WSDL_Message,...) )

Some test has been added.
A methods of a Web-service detecting functionality has been added.
WS-method compare functionality has been added.
Additional compare information is returning now.
A bug about incorrectly processing of a method without output message has been fixed.
- Some debug output has been added to DifferenceComputer#getWSMethodDiff
- toString method has been overrode in DiffWSMethodInfo.java
- Some comments and debug output have been changed in TypeDescriptor.java
Two classes for work with XSD schemas have been added:
- XmlSchemaProcessor.java provide fllowing capabilities:
    1. to load XSD schemas by InputStream, File or StreamSource and return a set of XmlSchemaType from all loaded schemas;
    2. Prepare XmlSchemaType objects from XSD schemas in a XmlSchemaCollection for obtain TypeDescriptor objects by XmlSchemaTypeProcessor.

Some tests have been added for checking added functionality (see XmlSchemaPreprocessorTest.java).
A capability to compare two xsd files or two XmlSchemaCollection objects has been added.

Some test for added capability has been added.
Some test for XSD file processing has been wrote.

Removed types searching algorithm has been wrote - changes are in DifferenceComputer#getXSDTypesDiffs

Some redundancy code has been deleted in WSDLProcessor.java

A bug about obtaining a result of computing in XmlSchemaProcessor#getXmlSchemaTypeDescriptors has been fixed.
A ref attribute of an element processing has been added.
Merge branch 'ref_attr_of_element_support' into additional_compare_info
Merge remote-tracking branch 'remotes/origin/additional_compare_info'
Root package name has been changed from 'com' to 'ru'
At this time a type may be null - XmlSchema:1.4.7 library presents xsd:anyType as null
This fix contains additional check for the NULL-value of an element type.