fixed typo

v2/libtpcmicropet/tpcmicropet.h

 /** @file tpcmicropet.h
     @brief Header file for libtpcmicropet.
     @details 
-     Function are not intended to support all micropET files or file properties, 
+     Function are not intended to support all microPET files or file properties, 
      but only those that have been found necessary in Turku PET Centre. 
 
      Procedures in this file are not dependent on IMG struct.