Add config option for transcendental BASIC functions

Also move all transcendental functions to a separate source directory
Turn off these functions for all configurations for now

strings/A390034C

@@ -0,0 +1,3 @@
+$A3 + BCC $03 + JMP fragment
+
+Fragments

strings/A6A9012CA9

@@ -0,0 +1,3 @@
+$A6 + LDA #$01 + BIT fragment
+
+Fragments

strings/B0A90085

@@ -0,0 +1,3 @@
+$B0 + LDA #$00 + STA fragment
+
+Fragments

strings/E0A90020

@@ -0,0 +1,3 @@
+$E0 + LDA #$00 + JSR fragment
+
+Fragments