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/tests2/85_asm-outside-function.c

@@ -0,0 +1,9 @@
+extern int printf (const char *, ...);
+extern void vide(void);
+__asm__("vide: ret");
+
+int main() {
+    vide();
+    printf ("okay\n");
+    return 0;
+}