Include Headers in the lib #297

Job	Run time
ubuntu cmake	15s
windows (Win32, standard)	1m 24s
ubuntu (g++, standard)	1m 10s
macos cmake	15s
windows (Win32, PUGIXML_WCHAR_MODE)	1m 24s
ubuntu (g++, PUGIXML_WCHAR_MODE)	1m 9s
windows (Win32, PUGIXML_COMPACT)	2m 5s
ubuntu (g++, PUGIXML_COMPACT)	1m 10s
windows (Win32, PUGIXML_NO_EXCEPTIONS)	1m 8s
ubuntu (g++, PUGIXML_NO_EXCEPTIONS)	1m 1s
windows (x64, standard)	1m 16s
ubuntu (clang++, standard)	52s
windows (x64, PUGIXML_WCHAR_MODE)	1m 46s
ubuntu (clang++, PUGIXML_WCHAR_MODE)	50s
ubuntu (clang++, PUGIXML_COMPACT)	56s
windows (x64, PUGIXML_COMPACT)	1m 45s
windows (x64, PUGIXML_NO_EXCEPTIONS)	1m 37s
ubuntu (clang++, PUGIXML_NO_EXCEPTIONS)	53s
macos (clang++, standard)	59s
macos (clang++, PUGIXML_WCHAR_MODE)	46s
macos (clang++, PUGIXML_COMPACT)	42s
macos (clang++, PUGIXML_NO_EXCEPTIONS)	46s
	24m 9s

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