Use load_ipython_extension to register doit magic functions

[tonyfast]

With this update

%load_ext doit.tools

replaces

from doit.tools import register_doit_as_IPython_magic
register_doit_as_IPython_magic()

This works using load_ipython_extension instead of register_doit_as_IPython_magic .

Here is an example notebook with this change.

[coveralls]

Coverage remained the same at 99.73% when pulling fb1517f on tonyfast:load_ipython_extension into 0c518d6 on pydoit:master.

[schettino72]

@ankostis , since you wrote the original code can you help review this?

Thanks @tonyfast , it looks better but a few questions:

• is this load_ipython_extension a new thing? is there any advantage in using the register style?
• can we have %load_ext doit instead of %load_ext doit.tools
• it would be nice to maintain compatibility for a while (add a deprecation warning), or just support both styles forever.
• please add an entry on CHANGES and AUTHORS

[tonyfast]

• is this load_ipython_extension a new thing? is there any advantage in using the register style?

  load_ipython_extension has been a thing for as long as I have known; it provides extra functionality to the register style. This documentation highlights writing extensions.

• can we have %load_ext doit instead of %load_ext doit.tools

  Example

• it would be nice to maintain compatibility for a while (add a deprecation warning), or just support both styles forever.

[schettino72]

have you noticed your changes broke the build?

[coveralls]

Coverage increased (+0.0001%) to 99.73% when pulling 6d49d44 on tonyfast:load_ipython_extension into 0c518d6 on pydoit:master.

[tonyfast]

Missed that. I sorted the pyflakes error and now everything passes.

[schettino72]

thanks. I have finally (squashed) and merged this. I tested it and it works fine :)

Seems github is not smart enough to detect I merged manually.