Added build files to turn the bible into a book

manuscript/chapter15.txt

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+# Information about the terminal
+
+## Get the terminal size in lines and columns (*from a script*)
+
+This is handy when writing scripts in pure bash and `stty`/`tput` can’t be
+called.
+
+**Example Function:**
+
+```sh
+get_term_size() {
+    # Usage: get_term_size
+
+    # (:;:) is a micro sleep to ensure the variables are
+    # exported immediately.
+    shopt -s checkwinsize; (:;:)
+    printf '%s\n' "$LINES $COLUMNS"
+}
+```
+
+**Example Usage:**
+
+```shell
+# Output: LINES COLUMNS
+$ get_term_size
+15 55
+```
+
+## Get the terminal size in pixels
+
+**CAVEAT**: This does not work in some terminal emulators.
+
+**Example Function:**
+
+```sh
+get_window_size() {
+    # Usage: get_window_size
+    printf '%b' "${TMUX:+\\ePtmux;\\e}\\e[14t${TMUX:+\\e\\\\}"
+    IFS=';t' read -d t -t 0.05 -sra term_size
+    printf '%s\n' "${term_size[1]}x${term_size[2]}"
+}
+```
+
+**Example Usage:**
+
+```shell
+# Output: WIDTHxHEIGHT
+$ get_window_size
+1200x800
+
+# Output (fail):
+$ get_window_size
+x
+```
+
+## Get the current cursor position
+
+This is useful when creating a TUI in pure bash.
+
+**Example Function:**
+
+```sh
+get_cursor_pos() {
+    # Usage: get_cursor_pos
+    IFS='[;' read -p $'\e[6n' -d R -rs _ y x _
+    printf '%s\n' "$x $y"
+}
+```
+
+**Example Usage:**
+
+```shell
+# Output: X Y
+$ get_cursor_pos
+1 8
+```
+
+<!-- CHAPTER END -->
+