Add travis job to publish on PyPI.

Also moved some shortcuts into manimlib, to be able to use it without the big_ol_pile_of_manim_imports script. Updated the README to explain installation via pip

manimlib/shortcuts.py

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+from manimlib.constants import *
+
+from manimlib.animation.animation import *
+from manimlib.animation.composition import *
+from manimlib.animation.creation import *
+from manimlib.animation.fading import *
+from manimlib.animation.growing import *
+from manimlib.animation.indication import *
+from manimlib.animation.movement import *
+from manimlib.animation.numbers import *
+from manimlib.animation.rotation import *
+from manimlib.animation.specialized import *
+from manimlib.animation.transform import *
+from manimlib.animation.update import *
+
+from manimlib.camera.camera import *
+from manimlib.camera.mapping_camera import *
+from manimlib.camera.moving_camera import *
+from manimlib.camera.three_d_camera import *
+
+from manimlib.mobject.coordinate_systems import *
+from manimlib.mobject.changing import *
+from manimlib.mobject.frame import *
+from manimlib.mobject.functions import *
+from manimlib.mobject.geometry import *
+from manimlib.mobject.matrix import *
+from manimlib.mobject.mobject import *
+from manimlib.mobject.number_line import *
+from manimlib.mobject.numbers import *
+from manimlib.mobject.probability import *
+from manimlib.mobject.shape_matchers import *
+from manimlib.mobject.svg.brace import *
+from manimlib.mobject.svg.drawings import *
+from manimlib.mobject.svg.svg_mobject import *
+from manimlib.mobject.svg.tex_mobject import *
+from manimlib.mobject.three_d_utils import *
+from manimlib.mobject.three_dimensions import *
+from manimlib.mobject.types.image_mobject import *
+from manimlib.mobject.types.point_cloud_mobject import *
+from manimlib.mobject.types.vectorized_mobject import *
+from manimlib.mobject.mobject_update_utils import *
+from manimlib.mobject.value_tracker import *
+from manimlib.mobject.vector_field import *
+
+from manimlib.once_useful_constructs.arithmetic import *
+from manimlib.once_useful_constructs.combinatorics import *
+from manimlib.once_useful_constructs.complex_transformation_scene import *
+from manimlib.once_useful_constructs.counting import *
+from manimlib.once_useful_constructs.fractals import *
+from manimlib.once_useful_constructs.graph_theory import *
+from manimlib.once_useful_constructs.light import *
+
+from manimlib.scene.graph_scene import *
+from manimlib.scene.moving_camera_scene import *
+from manimlib.scene.reconfigurable_scene import *
+from manimlib.scene.scene import *
+from manimlib.scene.sample_space_scene import *
+from manimlib.scene.graph_scene import *
+from manimlib.scene.scene_from_video import *
+from manimlib.scene.three_d_scene import *
+from manimlib.scene.vector_space_scene import *
+from manimlib.scene.zoomed_scene import *
+
+from manimlib.utils.bezier import *
+from manimlib.utils.color import *
+from manimlib.utils.config_ops import *
+from manimlib.utils.images import *
+from manimlib.utils.iterables import *
+from manimlib.utils.file_ops import *
+from manimlib.utils.paths import *
+from manimlib.utils.rate_functions import *
+from manimlib.utils.simple_functions import *
+from manimlib.utils.sounds import *
+from manimlib.utils.space_ops import *
+from manimlib.utils.strings import *