Lambda-uploader

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- Warn if the lambda package is over the current AWS max size of 50MB
- Add --extra-file flag for adding arbitrary file(s) outside of the
project directory.
- Add --requirements flag to allow setting a requirements file as a CLI
option
- Updated the Package() object so only the build() method actually needs
to be called.
- Updated the Package() constructor and removed most of the allowed
variables in favor of calling setter methods.
- Add -c shorthand to the --config flag
- Fixed the ignores to match against paths relative to the source dir
- Added support for placing your lambda functions in specific VPC
subnets and security groups

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- Set hard Python requirements on 2.7
- Fixed issue with lambda-uploader only looking for requirements.txt in the cwd

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- Added optional zip file name to package class(API only)
- Updated boto3 version to 1.2.2

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- Added support for ignoring files
- Added the ability to use an existing virtual environment
- Fixed the temporary workspace name to prevent confusion
- Updated the virtualenv site-packages copy to include lib64 if it
is not a symlink
- Add --no-virtualenv flag and set the default behavior to no longer create
a virtual environment unless package requirements are found

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- Added flag to allow specifying the lambda.json path
- Added a role flag and environment variable to use in lieu of setting
it in the config

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- Fixed issue with multiple requirements set in the config causing
an error