New lessons on Git for novices

[gvwilson]

Imported from lessons/swc-git, edited somewhat, broken into smaller chunks. Still needs:

• instructors' guide
• challenge problems

[DamienIrving]

At the beginning of 03-conflict.md, the material says "Now let's switch to the moons branch and make a different change there." The code that follows is missing a git checkout moons to switch to the moons branch.

[ahmadia]

I don't think this is true and I'd rather not put unsubstantiated opinions such as this into our lesson material. Git is popular because it is a good model and has community support. GitHub plays a role, but not the "primary" one.

[ahmadia]

@gvwilson - I'm planning on writing a new version of the Git lessons (really!). I just posted a proposed outline to #127 (comment), but I don't think it will mean much until I've actually gone through and drafted a lesson. Do you mind if I work from the material in this PR?

[gvwilson]

On 2013-11-22 4:01 PM, Aron Ahmadia wrote:

@gvwilson https://github.com/gvwilson - I'm planning on writing a
new version of the Git lessons (really!). I just posted a proposed
outline to #127 (comment)
#127 (comment),
but I don't think it will mean much until I've actually gone through
and drafted a lesson. Do you mind if I work from the material in this PR?

@ethanwhite is shepherding the new intermediate lessons --- I still
don't feel I know about Git to tackle anything that sophisticated :-)

[ahmadia]

@gvwilson, my plan is to revise our approach to Git in both beginner and intermediate lesson material. I'll sneak in some work on the lesson this week :)

[gvwilson]

On 2013-11-23 2:09 PM, Aron Ahmadia wrote:

@gvwilson https://github.com/gvwilson, my plan is to revise our
approach to Git in both beginner and intermediate lesson material.
I'll sneak in some work on the lesson this week :)

I'm comfortable with the new beginner material as-is (having taught it
several times now). The big question is, does the intermediate lesson
assume no previous Git, and try to cover everything, or assume knowledge
of the beginner's material?