Add `.String.fromSpacedTo...`

[cusspvz]

Add .String.fromSpacedTo... as porposed on ROADMAP of 0.3.0 milestone.

[cusspvz]

@brunocasanova could you do a PR where you implement this ?

[cusspvz]

@gabrielpconceicao do you want to race with @brunocasanova ?

[cusspvz]

ping @brunocasanova @gabrielpconceicao

[brunocasanova]

@cusspvz i have a proposal here, i did the st.fromCamel - "CamelCase" thing only. What do you think to add st.fromLowerCamel - "camelCase" and another st.fromUpperCamel - "CamelCase" instead only CamelCase?

[cusspvz]

I think st.fromCamel already covers lowerCamelCase and UpperCamelCase to any others