More work on initial implementation

diff --git a/gssspi_set_cred_option.c b/inquire_cred_by_oid.c
similarity index 100%
rename from gssspi_set_cred_option.c
rename to inquire_cred_by_oid.c

diff --git a/gssspi_mech_invoke.c b/inquire_sec_context_by_oid.c
similarity index 100%
rename from gssspi_mech_invoke.c
rename to inquire_sec_context_by_oid.c

diff --git a/gss_set_sec_context_option.c b/mech_invoke.c
similarity index 100%
rename from gss_set_sec_context_option.c
rename to mech_invoke.c

diff --git a/gss_inquire_sec_context_by_oid.c b/set_cred_option.c
similarity index 100%
rename from gss_inquire_sec_context_by_oid.c
rename to set_cred_option.c

diff --git a/gss_inquire_cred_by_oid.c b/set_sec_context_option.c
similarity index 100%
rename from gss_inquire_cred_by_oid.c
rename to set_sec_context_option.c