Replacements (aliases) for BL, MF and BQ

[rangoo94]

These icons are missing - I will try to prepare these flags according to famfamfam style.

Also, it's worth to add aliases for BL, MF & BQ (BL = MF = FR, BQ = NL). I will investigate it further and eventually alias these countries.

I will make proper PR on evening.

[t1st3]

@rangoo94 thanks for your suggestions, I'm all for them.
About aliases, since BL = MF = FR, it would not be sane to include 3 times the same flag. Although the spritesheet could be hacked with such information, what would you expect for an aliasing method of the icons

[rangoo94]

@t1st3 not sure yet, I will review node-spritesheet to check if there is any proper method. If not, I would create small method with configurable aliases to replace such text (by e.g. gulp-replace).

Then for example input { "bl": "fr", "mf": "fr" } can create regular expression to change all occurrences of \.famfamfam-flags\.(bl|mf) to .famfamfam-flags.fr. These aliases should be in configuration JSON file, because that's just set of data.

[t1st3]

Sounds good to me!
I don't know much of the internals of node-spritesheet, but I struggled recently to install it; I hope it won't be much a hassle for your PR!

[rangoo94]

I splitted this issue as I am not sure about quality of these icons; I will add more info at #13.