Lex all the c keywords

[kinggoesgaming]

Currently, we only detect only a few of them, but let's not discriminate :)

[onehr]

Need to worry about this: https://en.wikibooks.org/wiki/C_Programming/C_trigraph

[austinpgraham]

Do you mind assigning me to this issue? That way I'll be notified.

[onehr]

@austinpgraham Yes, I will, but your name can not show in the assignees list, so I will assign it to you later when I can see your name in the assignees list.

[onehr]

Need to worry about this: https://en.wikibooks.org/wiki/C_Programming/C_trigraph

Trigraph should be converted in preprocessor.