echinus from X11:windowmanagers project

对于 openSUSE Tumbleweed，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/X11:windowmanagers/openSUSE_Tumbleweed/X11:windowmanagers.repo
zypper refresh
zypper install echinus

对于 openSUSE Factory ARM，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/X11:windowmanagers/openSUSE_Factory_ARM/X11:windowmanagers.repo
zypper refresh
zypper install echinus

对于 15.5，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/X11:windowmanagers/15.5/X11:windowmanagers.repo
zypper refresh
zypper install echinus

对于 15.4，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/X11:windowmanagers/15.4/X11:windowmanagers.repo
zypper refresh
zypper install echinus

对于 SLE 15 SP4 Backports，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/X11:windowmanagers/SLE_15_SP4_Backports/X11:windowmanagers.repo
zypper refresh
zypper install echinus