Fix while loop iterator incorrect count 

The while loop is repeated 100 times not 99 times. 0~99 inclusive.
Merge pull request #414 from mvalipour/patch-1

[csharp/en] Fix while loop iterator incorrect count
added an online intro into Python for scientists
Merge pull request #415 from stared/misc

[python/en] a link to an online intro for scientists, in IPython Notebook
Corrects Array#[,] entry

The #[i,l] method returns a subarray starting at index i and continuing for length l. [source](http://ruby-doc.org/core-1.9.3/Array.html#method-i-5B-5D)
Merge pull request #416 from jmromer/ruby-array

Corrects Array#[,] entry
[bash/zh-cn] chinese bash translation