Initialize build system

Initialize the build system and create an empty documentation file.

.gitignore

+docs/
+*.html

.gitmodules

+[submodule "build"]
+	path = build
+	url = https://gitlab.labs.nic.cz/turris/buildsystem.git

Makefile

+# This file contains configuration of the build. It may be generated by some
+# script in the future.
+
+# The RELATIVE variable is for the wrapper makefiles.
+O := $(RELATIVE).
+S := $(RELATIVE).
+ASCIIDOC := asciidoc
+
+include $(S)/Makefile.dir
+

Makefile.dir

+include $(S)/build/Makefile.top
+
+include $(S)/design/Makefile.dir
+
+include $(S)/build/Makefile.dir
+include $(S)/build/Makefile.bottom

build @ b13f0cfe

+Subproject commit b13f0cfee279220971a33fb73159e2b3bef4de31

design/Makefile

+RESTRICT := design
+RELATIVE := ../
+
+include $(RELATIVE)/Makefile

design/Makefile.dir

+DOCS += design/requirements

design/requirements.txt

+Requirements
+============