initial commit: The OrbTK book source tree

All files have a strong relation to the book sources of the
rust-lang project itself. This may help to lower the burden
for intrested people to get involved in OrbTK as well as
reuse workflow habits.

* LICENSE-MIT: The projekt licensing terms
* README.md: Github frontpage
* CONTIRBUTING.md: Advises on howto help improving the book
* style-guide.md: Advises on howto improve the readability of
  generated prose and code.
* tools: layout helper scripts and rust-code
* ci: continius integration helper scripts
* .gitattributes: set git default behaviours
* .gitignore: keep source tree sane
* Cargo.toml: package dependencies
* rustfmt.toml: formatting rules for rust code
* book.toml: mdBook dependencies

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

Cargo.toml

@@ -0,0 +1,47 @@
+[package]
+name = "orbtk-book"
+version = "0.0.1"
+authors = ["Florian Blasius, <"]
+description = "The Orbital Widget Toolkit"
+edition = "2018"
+
+[[bin]]
+name = "concat_chapters"
+path = "tools/src/bin/concat_chapters.rs"
+
+[[bin]]
+name = "convert_quotes"
+path = "tools/src/bin/convert_quotes.rs"
+
+[[bin]]
+name = "lfp"
+path = "tools/src/bin/lfp.rs"
+
+[[bin]]
+name = "link2print"
+path = "tools/src/bin/link2print.rs"
+
+[[bin]]
+name = "release_listings"
+path = "tools/src/bin/release_listings.rs"
+
+[[bin]]
+name = "remove_hidden_lines"
+path = "tools/src/bin/remove_hidden_lines.rs"
+
+[[bin]]
+name = "remove_links"
+path = "tools/src/bin/remove_links.rs"
+
+[[bin]]
+name = "remove_markup"
+path = "tools/src/bin/remove_markup.rs"
+
+[dependencies]
+walkdir = "2.3.1"
+docopt = "1.1.0"
+serde = "1.0"
+regex = "1.3.3"
+lazy_static = "1.4.0"
+flate2 = "1.0.13"
+tar = "0.4.26"