Added barnsley SConstructs + relevant .gitignore clauses

Author: Amaras

.gitignore

@@ -517,3 +517,10 @@ vscode/
 
 # aspell
 *.bak
+
+# SCons database files
+**/.sconsign.dblite
+
+# SCons compiled files
+*.out
+*.o

contents/barnsley/code/c++/SConstruct

@@ -0,0 +1,3 @@
+executable = Program('barnsley.out', 'barnsley.cpp', CCFLAGS='-std=c++17 -Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wold-style-cast -Wcast-align -Wunused -Woverloaded-virtual -Wpedantic -Wconversion -Wsign-conversion -Wnull-dereference -Wdouble-promotion -Wformat=2')
+
+Command(target='out.dat', source=executable, action='./$SOURCE')

contents/barnsley/code/c/SConstruct

@@ -0,0 +1,3 @@
+executable = Program('barnsley.out', 'barnsley.c', CCFLAGS='-Wall -Wextra -Wshadow -Wcast-align -Wunused -Wpedantic -Wconversion -Wsign-conversion -Wnull-dereference -Wdouble-promotion -Wformat=2')
+
+data_file = Command(target='barnsley.dat', source=executable, action='./$SOURCE')

contents/barnsley/code/java/SConstruct

@@ -0,0 +1,3 @@
+class_files = Java('.', '.')
+
+Command(target='barnsley.dat', source=class_files, action='java Barnsley')

contents/barnsley/code/julia/SConstruct

@@ -0,0 +1 @@
+Command(target='out.dat', source='barnsley.jl', action='julia $SOURCE')