bash: Split the shell prompt into two lines

When the working directory is too long, the space left for the command
is too short.

Change the prompt to wait for the command on the next line, and use
special UTF-8 unicode characters (box drawings and a pointer) to make
it a little bit nicer.
Signed-off-by: Cédric Marie <cedric@hjuvi.fr.eu.org>

README

 Painted Shell: A collection of colorful settings and scripts for Bash shell.
 
-Written in 2013-2019 by Cédric Marie <cedric@hjuvi.fr.eu.org>
+Written in 2013-2020 by Cédric Marie <cedric@hjuvi.fr.eu.org>
 
 To the extent possible under law, the author(s) have dedicated all copyright
 and related and neighboring rights to this software to the public domain

bash/init

@@ -4,7 +4,7 @@
 # init - Configuration for bash
 # This file is part of Painted Shell - Shell configuration and scripts.
 #
-# Written in 2013-2018 by Cédric Marie
+# Written in 2013-2020 by Cédric Marie
 #
 # To the extent possible under law, the author(s) have dedicated all copyright
 # and related and neighboring rights to this software to the public domain
@@ -29,7 +29,7 @@ if [ -f /usr/share/git-core/contrib/completion/git-prompt.sh ]; then
 fi
 # Set colorful prompt
 if [ "$TERM" != "" ]; then
-    PS1='\[\e[1;37;43m\]\t\[\e[0m\] \[\e[1;36;44m\]\w\[\e[0;32;40m\]$(__git_ps1)\[\e[0m\]\[\e[1;31m\] >\[\e[0m\] '
+    PS1='\[\e[1;31m\]╭─\[\e[1;37;43m\]\t\[\e[0m\] \[\e[1;36;44m\]\w\[\e[0;32;40m\]$(__git_ps1)\[\e[0m\]\n\[\e[1;31m\]╰────────►\[\e[0m\] '
 fi
 # Add the path to scripts if not yet present
 echo $PATH | grep -q "$PAINTED_SHELL_PATH/scripts" || PATH=$PATH:$PAINTED_SHELL_PATH/scripts