Add programming language selection process.

Add programming language selection process.
Add a link from the Process README to the selection process.
Minor formatting.
Add note encrging supp langs for critical projects

Add note encouraging supported languages for critical path projects.
Add more questions & highlight not-supported languages.

Add more questions to be answered and highlight that existing legacy languages
should not be supported.
Merge branch 'master' into language-selection
Update to separate into general purpose and specialized

Update the language selection guidelines to separate the languages into general
purpose and specialized languages.
Refine the criteria for both
Fix sub-list indentation

Fix sub-list indentation.
Fix 'MediaWikia => MediaWiki'
Update to answer questions regarding usage

 - Add sections for enumerating the languages in each category.
 - Add sections for enumerating the questions that must be answered.
 - Add statement about when each category can be used
Add hyphen
Merge pull request #51 from Wikia/language-selection

Language selection guidelines