Deprecate MMCore property block functions

It is not clear to me what these were intended for, but they are
probably part of a planned but unfinished feature (seeing that it
appears to be tied to an Equipment command in config files, which, as
far as I know, was never supported by the Hardware Configuration
Wizard).

Some of the functions deprecated here may crash when called with
incorrect parameters.

MMCore/MMCore.cpp

@@ -5635,6 +5635,8 @@ bool CMMCore::isGroupDefined(const char* groupName)
  * Defines a reference for the collection of property-value pairs.
  * This construct is useful for defining
  * interchangeable equipment features, such as objective magnifications, filter wavelengths, etc.
+ *
+ * @deprecated Property blocks will not be supported in the future.
  */
 void CMMCore::definePropertyBlock(const char* blockName, const char* propertyName, const char* propertyValue)
 {
@@ -5663,6 +5665,8 @@ void CMMCore::definePropertyBlock(const char* blockName, const char* propertyNam
 
 /**
  * Returns all defined property block identifiers.
+ *
+ * @deprecated Property blocks will not be supported in the future.
  */
 std::vector<std::string> CMMCore::getAvailablePropertyBlocks() const
 {
@@ -5676,6 +5680,8 @@ std::vector<std::string> CMMCore::getAvailablePropertyBlocks() const
 
 /**
  * Returns the collection of property-value pairs defined in this block.
+ *
+ * @deprecated Property blocks will not be supported in the future.
  */
 PropertyBlock CMMCore::getPropertyBlockData(const char* blockName)
 {
@@ -5693,6 +5699,8 @@ PropertyBlock CMMCore::getPropertyBlockData(const char* blockName)
 
 /**
  * Returns the collection of property-value pairs defined for the specific device and state label.
+ *
+ * @deprecated Property blocks will not be supported in the future.
  */
 PropertyBlock CMMCore::getStateLabelData(const char* deviceLabel, const char* stateLabel)
 {
@@ -5725,6 +5733,8 @@ PropertyBlock CMMCore::getStateLabelData(const char* deviceLabel, const char* st
 
 /**
  * Returns the collection of property-value pairs defined for the current state.
+ *
+ * @deprecated Property blocks will not be supported in the future.
  */
 PropertyBlock CMMCore::getData(const char* deviceLabel)
 {

MMCore/MMCore.h

@@ -345,10 +345,10 @@ class CMMCore
 
    /** \name Property blocks. */
    ///@{
-   void definePropertyBlock(const char* blockName, const char* propertyName,
-         const char* propertyValue);
-   std::vector<std::string> getAvailablePropertyBlocks() const;
-   PropertyBlock getPropertyBlockData(const char* blockName);
+   MMCORE_DEPRECATED(void definePropertyBlock(const char* blockName, const char* propertyName,
+         const char* propertyValue));
+   MMCORE_DEPRECATED(std::vector<std::string> getAvailablePropertyBlocks() const);
+   MMCORE_DEPRECATED(PropertyBlock getPropertyBlockData(const char* blockName));
    ///@}
 
    /** \name Image acquisition. */
@@ -464,9 +464,9 @@ class CMMCore
       throw (CMMError);
    long getStateFromLabel(const char* stateDeviceLabel,
          const char* stateLabel) throw (CMMError);
-   PropertyBlock getStateLabelData(const char* stateDeviceLabel,
-         const char* stateLabel);
-   PropertyBlock getData(const char* stateDeviceLabel);
+   MMCORE_DEPRECATED(PropertyBlock getStateLabelData(const char* stateDeviceLabel,
+         const char* stateLabel));
+   MMCORE_DEPRECATED(PropertyBlock getData(const char* stateDeviceLabel));
    ///@}
 
    /** \name Focus (Z) stage control. */