Bug #31, Re-wrote "get_custom_post_type_template()" function.. [LACE]

* ...To hopefully be more fault tolerant - hypothesis issue
* Plus, added `*_Base->message()` and `debug()` functions
Bug #30, Re-factor "wp_evidence_hub" PHP - part 2 [LACE]
"isset()" fix to custom post-type base class PHP [LACE]