make import prefix optional during download generation
replace Sidekiq's redis with $redis in codebase
add ActiveToken module and include in Search
replace occurrences of id(s) with token(s) for imports

Conflicts:
	lib/modules/import_tools/redis_handler.rb
	test/unit/import_tools/redis_handler_test.rb
create and find methods in active_token accepts extra arguments
Merge pull request #108 from unepwcmc/use_standard_redis_client

Prefer standard Redis client to Sidekiq's
apply style corrections in download modules
Merge branch 'master' into create_active_token_module

Conflicts:
	lib/modules/import_tools/redis_handler.rb
	test/unit/import_tools/redis_handler_test.rb
Merge pull request #114 from unepwcmc/add_s3_downloads_prefixes

Add S3 downloads prefixes
apply style corrections and rename shaify_token method
Merge pull request #115 from unepwcmc/create_active_token_module

Create ActiveToken module
Merge branch 'download_search' into add_download_functionality_to_search_module
apply style corrections to search module