Fix issue cannot correctly analyze arguments with space in tag

[winterTTr]

I found that when use the tag with space in parameter, even i wrapped it within a string literal, it do not work. For example:

{% qnimg "image path with space" %}

when this (custom) tag is process, the arguments will become an array of

["image", "path", "with", "space"]

instead of

["image path with space"]

This is a big issue for any kind of tag ( no matter hexo native tag or custom tag plugin).

I found that the issue is, hexo simply connect all the lexical node to a string and then split it with space, this is not correct and result in the issue i mention.

So i fix it.

[winterTTr]

AssertionError: expected Fri, 06 Nov 2015 14:26:59 GMT to deeply equal Fri, 06 Nov 2015 14:26:59 GMT
+ expected - actual

-[Date: 2015-11-06T14:26:59.243Z]
+[Date: 2015-11-06T14:26:59.000Z]

at C:\projects\hexo\test\scripts\processors\post.js:505:33
at tryCatcher (C:\projects\hexo\node_modules\hexo-fs\node_modules\bluebird\js\main\util.js:26:23)
at Promise._settlePromiseFromHandler (C:\projects\hexo\node_modules\hexo-fs\node_modules\bluebird\js\main\promise.js:505:31)
at Promise._settlePromiseAt (C:\projects\hexo\node_modules\hexo-fs\node_modules\bluebird\js\main\promise.js:581:18)
at Promise._settlePromises (C:\projects\hexo\node_modules\hexo-fs\node_modules\bluebird\js\main\promise.js:697:14)

Seems this error is not coming from my change? Let me know if this is real my fault.

[winterTTr]

I explain more detail of my fix here
http://winterttr.me/2015/11/07/hexo-cannot-use-space-within-tag-arguments/

[Xuanwo]

@winterTTr
I rechack the fault, and it looks like an error on system time.
And sorry for my rebuild operation, no one will see what happened indeed beacuse the changes of .travis.yml.
Now I will merge it into master, thank you for your work.
Fix #1455