Added commit.sh, test_ex17.sh, test_pdf.sh
commit.sh    = To automate git commit (and|or) push actions
test_ex17.sh = Automates Testing of 'Learn C The Hard Way': ex17.c
test_pdf.sh  = Automates Testing of pdf.cpp downloaded from codeproject. pdf.c-
               pp was for converting a .pdf to a .txt