Enable importing of TEKS standards, subjects, and courses

[Closes #9][Closes #8]

Squashed commit of the following:

commit e01bde7b7f853c61bf49cd013606e8b6eabcb59d
Merge: d4eb61a 477bde6
Author: Matt Buck <github@matthewbuck.com>
Date:   Sat Nov 16 18:22:27 2013 -0600

    Merge master

commit d4eb61a2f24266cce015626bd56972a88d790756
Author: Alex Levine <a17levine@gmail.com>
Date:   Sat Nov 16 16:47:34 2013 -0600

    finished editing the parser to work with our database models and relationships

commit 4308c709cad29f40880768e1356ae0278d2cfc1d
Author: Alex Levine <a17levine@gmail.com>
Date:   Sat Nov 16 16:13:12 2013 -0600

    created models and migrations for TEKS standards and added TEKS csv