move exports to the top of each file so they are easier to see
replace tabs with 4-space indentation like the rest of the source
add stl files to test import
rename run_tests.jl to runtest.jl to it can be run with Pkg.test("Meshes")
add binary stl import and tests
add option to create topology (convert to face-vertex mesh) since it can take a long time
add topology flag into Mesh composite type
add ASCII STL import
Merge pull request #15 from sjkelly/import_stl

Import STL. Closes #13.