adding files.

.gitignore

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+*~
+*.pyc
+.idea
+build
+dist
+bag.egg-info

bag/__init__.py

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+# -*- coding: utf-8 -*-
+########################################################################################################################
+#
+# Copyright (c) 2014, Regents of the University of California
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
+# following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
+#   disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
+#    following disclaimer in the documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+########################################################################################################################
+
+"""This is the bag root package.
+"""
+from __future__ import (absolute_import, division,
+                        print_function, unicode_literals)
+# noinspection PyUnresolvedReferences,PyCompatibility
+from builtins import *
+
+import signal
+
+from . import math
+from .math import float_to_si_string, si_string_to_float
+from . import interface
+from . import design
+from . import data
+from . import tech
+from . import layout
+
+from .core import BagProject
+
+__all__ = ['interface', 'design', 'data', 'math', 'tech', 'layout', 'BagProject',
+           'float_to_si_string', 'si_string_to_float']
+
+# make sure that SIGINT will always be catched by python.
+signal.signal(signal.SIGINT, signal.default_int_handler)