switch build system to SCons

SConstruct

@@ -0,0 +1,25 @@
+# vim:syntax=python
+
+import os
+
+target = 'fart'
+subdirs = ['util', 'shapes', 'main', 'distrib']
+parser_sources = Glob('parser/*.cc')
+sources = map(lambda x: Glob(x + '/*.cc'), subdirs)
+lexer_source = 'parser/lex.yy.cc'
+parser_source = 'parser/parser.tab.cc'
+for f in parser_sources:
+    if str(f) != lexer_source and str(f) != parser_source:
+        sources.append(f)
+sources += [lexer_source, parser_source]
+
+env = Environment(CPPFLAGS = '-I.',
+        CXXFLAGS = '-Wall -O2',
+        YACCFLAGS = '-d',
+        LIBS = ['-lfl', '-lpthread', '-lfreeimage'])
+
+lexer = env.CXXFile(lexer_source, 'parser/parser.ll')
+parser = env.CXXFile(parser_source, 'parser/parser.yy')
+env.Depends(lexer, parser_source)
+
+env.Program(target, sources)