Add Doxygen doc words to lexicon.txt. (#31)

lexicon.txt

@@ -9,24 +9,32 @@ br
 buf
 buffera
 bufferb
+colspan
 cbmc
 com
+configpagestyle
 cond
 coverity
+copydoc
+cprover
+css
+defgroup
 describejobexecution
 developerguide
 endcond
 endif
 enum
 enums
 fd
+gcc
 getpendingjobexecutions
 html
 https
 ifndef
 inc
 ingroup
 iot
+iso
 jobid
 jobidlength
 jobids
@@ -40,27 +48,39 @@ jobssuccess
 jobstopic
 jobsupdatesuccess
 longjmp
+mainpage
 malloc
+microcontrollers
+misra
 mqtt
 nb
 noninfringement
 nul
+org
+os
 outapi
 outjobid
 outjobidlength
 outlength
 param
+pre
 ref
+rm
+sdk
 spdx
 startnextpendingjobexecution
 stderr
 strnappend
 strncpy
 strneq
 sublicense
+td
 thingname
 thingnamelength
+toolchain
 topiclength
+tr
 unwindings
 updatejobexecution
 valuelength
+www