Delete TODO, move to wiki

TODO.md

-TODO
-===
-
-- [ ] Add new books
-- [x] Wiki
-    - [x] How to Contribute
-    - [x] Link to License
-- [x] Readme.md
-    - [x] Better symantics
-    - [x] Links to other Files
-    - [x] Description
-    - [x] Link to License
-- [ ] Getting the word out there.
-    - [ ] Graphic Pack
-    - [x] Share links of tw,fb,gp,li,...
-- [ ] Alphabetizing the entries in the pages
-    - [ ] bg
-    - [ ] de
-    - [x] es
-    - [x] en
-    - [x] fa_IR
-    - [ ] fr
-    - [ ] it
-    - [ ] ja
-    - [ ] ko
-    - [ ] pt_BR
-    - [X] pt_PT
-    - [x] ru
-    - [ ] tr
-    - [x] zh
-    - [x] javascript framework
-    - [x] courses
-    - [x] problem sets