Version 2.0.4

This PR:

* represents the ongoing development for the next version (`2.0.4`).
* is a showcase to show what is being implemented.
* is a place to discuss and form the next version.

After arriving a stable state, I'll merge it to master and publish to Package Manager.

Here is some changes:

* Commit e17804d557a8d26c7a1ac306511254efa1f0673a implements a taller cursor:

    before:
    ![ekran grnts 2013 12 11 02_03_47](https://f.cloud.github.com/assets/844008/1725872/db9f2276-6286-11e3-80a7-35642705faf7.png)

    after:
    ![ekran grnts 2013 12 11 02_04_06](https://f.cloud.github.com/assets/844008/1725874/de0aa08a-6286-11e3-887a-52fbef88ed2b.png)

    Looks better for a writing environment. However this will work only on ST Build 3057 and above which is released yesterday (December, 10th).

* Commit dacb116677829846ff127a4b314e3c7c1a70a521 gives separators a slightly darker background. Now they are more noticeable.

    before:
    ![ekran grnts 2013 12 11 02_40_27](https://f.cloud.github.com/assets/844008/1725893/14f28b94-6287-11e3-8d2d-ca98fbb8545b.png)

    after:
    ![ekran grnts 2013 12 11 02_40_12](https://f.cloud.github.com/assets/844008/1725885/ffeed964-6286-11e3-9a83-39a74fa6e2a2.png)