improve distribution to PyPI

Now svg files, readme, unit tests, and license included in PyPI dis

MANIFEST.in

@@ -0,0 +1,2 @@
+include *.svg LICENSE*
+recursive-include test *.svg

build/lib/svgpathtools/__init__.py

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+from .bezier import (bezier_point, bezier2polynomial,
+                     polynomial2bezier, split_bezier,
+                     bezier_bounding_box, bezier_intersections,
+                     bezier_by_line_intersections)
+from .path import (Path, Line, QuadraticBezier, CubicBezier, Arc,
+                   bezier_segment, is_bezier_segment, is_path_segment,
+                   is_bezier_path, concatpaths, poly2bez, bpoints2bezier,
+                   closest_point_in_path, farthest_point_in_path,
+                   path_encloses_pt, bbox2path)
+from .parser import parse_path
+from .paths2svg import disvg, wsvg
+from .polytools import polyroots, polyroots01, rational_limit, real, imag
+from .misctools import hex2rgb, rgb2hex
+from .smoothing import smoothed_path, smoothed_joint, is_differentiable, kinks
+
+try:
+    from .svg2paths import svg2paths, svg2paths2
+except ImportError:
+    pass