Added translation resource for spanish

	Added spanish translation
	modified:   src/main/resources/cz/startnet/utils/pgdiff/Resources_es.properties

	Changed file encoding to UTF-8 for better compatibility
	modified:   src/main/resources/cz/startnet/utils/pgdiff/Resources_es.properties
dropped version number from spanish resource file as version number should be contained only in the default resource file
updated readme file about spanish translation
updated version number in default resource file
normalized the spanish resource file