Review and integrate open190: new .loading CSS class

[charlesh88]

open #190
CSS for revised .loading class;
Commented out/removed old .loading styles;
Theme constants for loading colors added to theme files;
See notes in #190 for usage.

Author checklist:

• Changes address original issue? Y
• Unit tests included and/or updated with changes? N/A
• Command line build passes? N/A
• Expect to pass code review? Y

[larkin]

@charlesh88 do we have a place for style docs like this? Thinking of an analogue to the bootstrap docs, something that shows usage of css and html and serves as documentation of it.

[larkin]

Instead of commenting out, can we just remove this? Git history will allow it to be recovered if we need it later.

[larkin]

@charlesh88 Instead of commenting out unused scss, can you remove it instead? It can be restored from git history if we need it at a later date.

[charlesh88]

Per suggestion, removed classes previously commented out and pushed to github.

[charlesh88]

HTML/CSS usage is documented in the Style Guide, toward the end: https://drive.google.com/a/nasa.gov/file/d/0B0v27OM1JkSeRTg0bzE1Q0hDOEE/view?usp=sharing

That said, this doc definitely needs to be updated and I'll add a task for this in the current sprint.

[larkin]

Review Checklist

1. Changes appear to address issue? Y
2. Appropriate unit tests included? N/A, style only changes
3. Code style and in-line documentation are appropriate? Y
4. Commit messages meet standards? Y
5. Project-specific information isolated to appropriate branches? Y

Integration Checklist

1. Automated build passing after merge? Y
2. No merge conflicts (or resolution trivial/obvious)? Y
3. All master branches up-to-date after merge? Y
4. Project-specific information isolated to appropriate branches? Y