Merge branch 'GP-0_ryanmkurtz_sleigh-example' (Closes NationalSecurityAgency#1667,

Closes NationalSecurityAgency#432, Closes NationalSecurityAgency#4528)

Author: ryanmkurtz

GhidraDocs/languages/html/sleigh_context.html

@@ -100,6 +100,7 @@
 define space register type=register_space size=4;
 define register offset=0 size=4 [ r0 r1 r2 r3 r4 r5 r6 r7 ];
 define register offset=0x100 size=4 [ s0 s1 s2 s3 s4 s5 s6 s7 ];
+define register offset=0x200 size=4 [ contextreg ]; # define context bits (if defined, size must be multiple of 4-bytes)
 
 define token instr(16)
   op=(10,15) rreg1=(7,9) sreg1=(7,9) imm=(0,6)