updates & cleanups (tcc-doc/Changelog/TODO ...)

- tcc-doc.texi: commandline option info update
- Changelog/TODO: update
- tests/tcctest.py: removed
- tests/Makefile: weaktest fixed
- tests/tests2: some files renamed and/or converted to unix LF
- configure/Makefile: --enable-static option (no dll on win32)
- win32/build-tcc.bat: msvc support
- win32/tcc-win32.txt: build info update
- win32/vs2015/: VS solution removed
- win32/include/tcc/tcc_libm.h: #include statement fixed
- tcc.c: -include <file> option help info
- .gitignore: cleanup

tests/tests2/84_hex-float.c

@@ -0,0 +1,12 @@
+extern int printf(const char *format, ...);
+
+#define ACPI_TYPE_INVALID       0x1E
+#define NUM_NS_TYPES            ACPI_TYPE_INVALID+1
+int array[NUM_NS_TYPES];
+
+#define n 0xe
+int main()
+{
+    printf("n+1 = %d\n", n+1);
+//    printf("n+1 = %d\n", 0xe+1);
+}