xmake v2.1.8 released, improve IDE/Editor plugin integration

This release improve IDE/Editor plugin integration, we provide the following plugins now:

• Vim Editor Plugin
  • xmake.vim (third-party, thanks @luzhlon)
• Visual Studio Code Editor Plugin (xmake-vscode)
• Sublime Text Editor Plugin (xmake-sublime)
• IntelliJ-based IDE Plugin (xmake-idea)
  • IntelliJ-IDEA
  • CLion
  • Android Studio

If you want to known more usage, please see online documents。

Source code: Github, Gitee.

New features

• Add XMAKE_LOGFILE environment variable to dump the output info to file
• Support tinyc compiler

Changes

• Improve support for IDE/editor plugins (.e.g vscode, sublime, intellij-idea)
• Add .gitignore file when creating new projects
• Improve to create template project
• Improve to detect toolchains on macosx without xcode
• Improve set_config_header to support set_config_header("config", {version = "2.1.8", build = "%Y%m%d%H%M"})

Bugs fixed

• #145: Fix the current directory when running target