Tune "Total lines of code" about metrics HOT 5 CLOSED

I must resolve #21 issue before to get values by file type. Do you want a pre defined list of langage or an list of language automatically deducted in relation to them the most used ?

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@florentk I want languages most used.

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partialy done via a4138d2

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• Languages should be proper "Java", "C++", "Kotlin"

Add 'ext_name' in addtiion of 'ext'

cloc.py:            results['ext'] = GraalRepository.extension(file_path)
lizard.py:        result['ext'] = file_path.split(".")[-1]
scc.py:            results['ext'] = GraalRepository.extension(file_path)

see python-libmagic

restrictd number of file type :
AOC : https://github.com/chaoss/grimoirelab-cereslib/blob/master/cereslib/enrich/enrich.py#L132
Graal : https://github.com/chaoss/grimoirelab-graal/blob/master/graal/backends/core/cocom.py#L233

Suuported by Lizard :

ALLOWED_EXTENSIONS = ['java', 'py', 'php', 'scala', 'js', 'rb', 'cs', 'cpp', 'c', 'lua', 'go', 'swift']

• C/C++ (works with C++14)
• Java
• C# (C Sharp)
• JavaScript (With ES6 and JSX)
• Objective-C
• Swift
• Python
• Ruby
• TTCN-3
• PHP
• Scala
• GDScript
• Golang
• Lua
• Rust

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done via 9f80cbf

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