Added self-referential test to wait_list.

For #742
Expanded test a little
Added sort-of-failing test for #754
Another unnecessary stop(). Fix for #743

This was essentially the same bug as #471, fixed in 
https://github.com/EventedMind/iron-router/commit/4f8e64eb889f3c539c754cda2f4bbf8bf6f887a4
Merge branch 'master' into devel
Merge branch 'devel' of github.com:EventedMind/iron-router into devel
add underscore to test block
attempted fix for infinite invalidation loop

@DerMambo, @tmeasday: can you see if this fixes the issue for you? and
doesn't cause side effects that I'm not thinking of. Use the devel
branch of iron-router. Thanks!

See issues:
* https://github.com/EventedMind/iron-router/issues/742.
* https://github.com/EventedMind/iron-router/issues/741
bump version for bug fix release
add version_conflict_error.js file
add versions.json file
Added failing test case for #742

@cmather — this exhibits my suspicion that decrementing the `notReadyCount` in the `afterFlush` is “too late”. 

One potential solution would be to do `deps.changed()` in the `afterFlush` if `notReadyCount` gets to 0 but I feel like that would just open a whole other kettle of fish.
Fix missing comma in smart.json
Merge pull request #770 from zimme/smart.json

Fix missing comma in smart.json
wip add tests for waitlist infinite loop
throw an error on infinite waitlist invalidation loops.

Users are finding themselves in a situation of infinite invalidation
loops. This can happen if you call this.ready() and then subsequently
add functions to the list which change the state in the same computation
tree.

Fix:
When you call wait(...) see whether we already have a dependency on the
current computation or any of its ancestors and if so throw a helpful
error message. For example:

var list = new WaitList;
Deps.autorun(function () {
 list.ready();

 Deps.autorun(function () {
   list.wait(...); // throw error
 });
});

Issue #742

cc @tmeasday, @DerMambo
Merge remote-tracking branch 'origin/devel' into devel
fix onRun should only run once.

Closes Issue #749
remove erroneous console.log
fix multiple data issues and make onRun actually only run once

Issue #745
Issue #749