Some spacing style rules pending implementation

[jvsqzj]

This issue aims to complete the spacing rules implementation.
Documenting implemented and pending spacing rules as detailed in the DML style guide here.

Pending rules:

• SP.reserved: spaces around reserved words, such as if, else, default, size, const and in, except when a reserved word is used as an identifier (e.g., local uint8 *data;) - @alecalvop
• SP.binop: spaces around binary operators except the dereferencing operators dot (a.b) and arrow (a->b) - @jvsqzj
• SP.ternary: spaces around ? and : in the ternary ?: operator - @jvsqzj
• SP.ptrdecl: space between a type and the * marking a pointer - @dtarassenko
• NSP.ptrdecl: no space after the * marking a pointer in a declaration - @dtarassenko
• SP.comment: spaces around the comment delimiters //, /* and **/ - @kevv87

Implemented rules:

• SP.braces: spaces around braces ({ and })
• SP.punct: spaces after but not before colon, semicolon and comma
• NSP.funpar: no spaces between a function/method name and its opening parenthesis
• NSP.inparen: no spaces immediately inside parentheses or brackets
• NSP.unary: no spaces between a unary operator and its operand
• NSP.TrailingWhitespace: no spaces between the last token in a line and the corresponding newline \n

[alecalvop]

@JonatanWaern This was completed with PR #108