ph_add_text usage

Dear Keon-Woong Moon,

I am planning since a long time to deprecate and defunct `ph_add_text`, `ph_add_par`, `ph_add_fpar` functions in package officer. You are using `ph_add_par` in the CRAN version but not in the github version, could you submit this version to cran. 

I will deprecate these functions in the next release.

KR,