Testing for Evented module

[chuckcarpenter]

this branch adds some tests for the base class and increases code coverage

TOTAL: 21 SUCCESS
-------------|----------|----------|----------|----------|-------------------|
File         |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
-------------|----------|----------|----------|----------|-------------------|
All files    |    72.01 |    59.19 |       64 |    72.78 |                   |
 evented.js  |    84.85 |    80.77 |      100 |    84.85 |    30,31,32,33,35 |
 shepherd.js |      100 |      100 |      100 |      100 |                   |
 step.js     |    66.67 |    55.12 |       40 |    68.02 |... 84,385,400,401 |
 tour.js     |    73.81 |       50 |      100 |    73.49 |... 61,165,166,167 |
 utils.js    |    90.48 |     87.5 |      100 |    90.48 |             34,52 |
-------------|----------|----------|----------|----------|-------------------|

[RobbieTheWagner]

Why did we change to return false here? Not saying it's wrong, just want to understand what it does for us.

[chuckcarpenter]

clearer response for tests

[RobbieTheWagner]

I wonder if maybe we should skip the return part, and just wrap the whole method in

if (!_.isUndefined(this.bindings) && !_.isUndefined(this.bindings[event])) {

[RobbieTheWagner]

Perhaps we should save that for a later refactor though, since we might replace evented anyway