added compare example

src/MODELLER/modeller-basic-example-julia/compare.jl

@@ -0,0 +1,15 @@
+using PyCall
+@pyimport modeller
+
+env = modeller.environ()
+aln = modeller.alignment(env)
+for (pdb, chain) in (("1b8p", "A"), ("1bdm", "A"), ("1civ", "A"),
+                     ("5mdh", "A"), ("7mdh", "A"), ("1smk", "A"))
+    m = modeller.model(env, file=pdb, model_segment=("FIRST:$chain", "LAST:$chain"))
+    aln[:append_model](m, atom_files=pdb, align_codes=string(pdb, chain))
+end
+aln[:malign]()
+aln[:malign3d]()
+aln[:compare_structures]()
+aln[:id_table](matrix_file="family.mat")
+env[:dendrogram](matrix_file="family.mat", cluster_cut=-1.0)