Update build rules.

1. Add autoconf build script.
2. Remove MS-DOS support.
3. Remove CMake build rules.
4. Fix bugs.
5. Update docs.
6. Remove Python build script.

	修改：     .gitignore
	删除：     CMakeLists.txt
	删除：     Makefile
	新文件：   Makefile.devel
	新文件：   Makefile.in
	修改：     README.md
	新文件：   build-aux/install-sh
	新文件：   build-aux/mkinstalldirs
	新文件：   configure.ac
	重命名：   doc/archs.md -> doc/architectures.md
	修改：     doc/compilers.md
	修改：     doc/doc.md
	重命名：   doc/stds.md -> doc/languagestandards.md
	修改：     doc/platforms.md
	重命名：   src/title.h -> include/libplatform.h.in
	重命名：   src/lparchs.h -> include/platform_predef/architectures.h
	重命名：   src/lpcomps.h -> include/platform_predef/compilers.h
	重命名：   src/lpstds.h -> include/platform_predef/languagestandards.h
	重命名：   src/lpplat.h -> include/platform_predef/platforms.h
	新文件：   m4/readfile.m4
	删除：     make.cmd
	删除：     src/_lpcomps_make.py
	删除：     src/end.h
	删除：     tools/build.py
	删除：     tools/dos-make.bat

Author: ChenPi11

.gitignore

@@ -1,7 +1,20 @@
-# libplatform .gitignore
-# Build output dir
+# Libplatform's gitignore
+
+# Build output directory
 build/
-# Editor config
+
+# Editor profile directory
 .vscode/
-# Makefile install data
-install.list
+
+# Autoconf temps
+autom4te.cache/
+aclocal.m4
+configure
+
+# Configure outputs
+config.log
+config.status
+
+# Build outputs
+include/libplatform.h
+Makefile

CMakeLists.txt

@@ -0,0 +1,17 @@
+# -*- makefile -*-
+# This is the developer's makefile.
+
+AUTOCONF = autoconf
+ACLOCAL = aclocal
+
+CONFIGURES = configure
+CONFIGURES_IN = configure.ac
+AUTOCONF_FILES = aclocal.m4 $(wildcard m4/*.m4)
+
+all : aclocal.m4 configure
+
+aclocal.m4 : $(CONFIGURES_IN) $(wildcard m4/*.m4)
+	$(ACLOCAL) -I m4 --output=$@ && touch $@ && $(RM) -rf autom4te.cache
+
+configure : configure.ac $(AUTOCONF_FILES)
+	$(AUTOCONF) && $(RM) -rf autom4te.cache

Makefile

@@ -0,0 +1,31 @@
+# Makefile for libplatform
+
+#### Start of system configuration section. ####
+
+# Directories used by "make install":
+prefix = @prefix@
+includedir = @includedir@/cppp
+
+# Programs used by "make install":
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+mkinstalldirs = $(SHELL) @top_srcdir@/build-aux/mkinstalldirs
+
+all : force
+
+install : force
+	if [ ! -d $(DESTDIR)$(includedir) ] ; then $(mkinstalldirs) $(DESTDIR)$(includedir) ; fi
+	$(INSTALL_DATA) include/libplatform.h $(DESTDIR)$(includedir)/libplatform.h
+
+installdirs : force
+	if [ ! -d $(DESTDIR)$(includedir) ] ; then $(mkinstalldirs) $(DESTDIR)$(includedir) ; fi
+
+uninstall : force
+	$(RM) $(DESTDIR)$(includedir)/libplatform.h
+
+clean : force
+
+force :
+
+# Work around an automake-1.8 bug.
+am--refresh:

Makefile.devel

@@ -1,25 +1,17 @@
-# libplatform
-libplatform is a platform check library
+# Introduction
+libplatform is a portable platform check library for C++ Plus
 ## Build
 ### Build with GNU Makefile
 #### Dependence
 + GNU Make
-+ GNU/Linux commands: **cat, mkdir, install, rm, echo**
++ GNU/Linux commands: **cat, mkdir, install, rm**
 #### Make and Install
 ```shell
+./configure
 make
 make install
 ```
 The build results are in the 'build' directory.
-### Build on Windows
-#### Dependence
-+ cmd.exe on Windows
-#### Make
-```shell
-call make.cmd
-```
-make.cmd does not support install.
-The build results are in the 'build' directory.
 ### Build with CMake
 #### Dependence
 + CMake (version >= 3.0)
@@ -30,37 +22,11 @@ cd build
 cmake ..
 ```
 The build results are in the 'build' directory.
-### Build with Python
-#### Dependence
-+ Python 3.x or Python 2.x
-+ Python base libraries (platform, shutil)
-+ Python build-in libraries (sys, os)
-#### Make and Install
-```shell
-python tools/build.py
-python tools/build.py install
-```
-Try 'python tools/build.py' --help for help
-### Build on MS-DOS
-**MS-DOS does not support long file names, so include output 'include\platform_predef.h' will be replaced to 'include\libplat.h'**
-#### Dependence
-+ MS-DOS shell (COMMAND.COM)
-#### Make and Install
-```shell
-cd tools
-call dos-make.bat
-```
-dos-make.bat will chdir to repository root directory automatic.
-dos-make.bat does not support install.
-The build results are in the 'build' directory.
-
-**Do not use dos-make.bat for build on Windows!**
 
 ## Usage
 After install, you can use libplatform in C/C++
 ```c
-#include <platform_predef.h>
-/*On MS-DOS, <platform_predef.h> is renamed to <libplat.h>*/
+#include <cppp/libplatform.h>
 #include <stdio.h>
 int main()
 {