build-tools: 2 passes required for for successful build

[cycomachead]

• we should handle creating topics.txt
• cleanup the warnings

👉 ./utilities/build-tools/rebuild-all.rb 
/Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/vocab.rb:11: warning: already initialized constant TEMP_FOLDER
/Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/selfcheck.rb:7: warning: previous definition of TEMP_FOLDER was here
/Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:14: warning: already initialized constant TEMP_FOLDER
/Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/vocab.rb:11: warning: previous definition of TEMP_FOLDER was here
/Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r
Rebuilding all index/summaries from: /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r

Rebuilding Sparks
/Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:308:in `initialize': No such file or directory @ rb_sysopen - /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/sparks/student-pages/review/topics.txt (Errno::ENOENT)
	from /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:308:in `open'
	from /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:308:in `add_content_to_file'
	from /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:251:in `block in parse_rawTopicPage'
	from /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:241:in `each'
	from /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:241:in `parse_rawTopicPage'
	from /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:159:in `block in parse_all_topic_files'
	from /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:159:in `each'
	from /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:159:in `parse_all_topic_files'
	from /Volumes/Michael/Users/michael/Dropbox/Projects/bjc-r/utilities/build-tools/main.rb:71:in `Main'
	from ./utilities/build-tools/rebuild-all.rb:32:in `<main>'