Move everything from bootstrap_and_overrides.

This file is generally only used for extending and overriding bootstrap
behavior and not general application styles.
Fixed indentation of all SCSS files.

Two spaces is de facto here.
Fixing spacing issues in SCSS files.

Again, I feel like this is pretty much de facto. The following examples
illustrate what I mean. The first is wrong, while the second is correct.

Example 1: footer{
Example 1:   border-top:3px solid #30add1;
Example 1: }

Example 2: footer {
Example 2:   border-top: 3px solid #30add1;
Example 2: }

See http://sass-lang.com/docs/yardoc/file.SASS_REFERENCE.html.
Utilizing what makes SCSS SCSS.

Sass is an extension of CSS3, adding nested rules, variables, mixins,
selector inheritance, and more. The following examples illustrate what
nesting means, which is what I have done. The 1st example can be written
as the 2nd, when utilizing SCSS.

Example 1: table.hl {
Example 1:   margin: 2em 0;
Example 1: }
Example 1:
Example 1: table.hl td.ln {
Example 1:   text-align: right;
Example 1: }

Example 2: table.hl {
Example 2:   margin: 2em 0;
Example 2:
Example 2:   td.ln {
Example 2:     text-align: right;
Example 2:   }
Example 2: }
Merge pull request #24 from badeball/scss-css-cleanup

SCSS/CSS cleanup