Changed writing of some phrases to be more gender inclusive.

This makes a more extensive uso of "/a" or "/as" to properly include the feminine form, every time needed.
"Intente colaborar para evitar conflictos" me suena genial.
Si, "Attempt collaboration before conflict." suena un poco a que se espera el conflicto como el "plan B".
Que dice @myabc y @wordgraphy?