retrying on download exceptions
fixing invalid downloader behaviour, when exceeds retries count on taric files query
fixing specs
fixing specs, increased number of retries for exceptions
fixing specs
Merge pull request #212 from bitzesty/taric-queries-fix

fix for taric downloader behaviour when it exceeds retries count
Merge pull request #211 from bitzesty/download-exceptions-retry-rebased

retrying on download exceptions
cleaning up the code after switching to redis locks
Merge pull request #213 from bitzesty/database-locks-cleanup

cleaning up the code after switching to redis locks
upgrade rails to 4.1.8

to address [CVE-2014-7829](https://groups.google.com/forum/#!topic/rubyonrails-security/rMTQy4oRCGk)
Merge pull request #214 from bitzesty/upgrade-rails

upgrade rails to 4.1.8
follow rails autoloading rules

We began getting a `ActiveSupport::Concern::MultipleIncludedBlocks`

- `Model::Declarable` -> `Declarable`
- `Models::Formatter` -> `Formatter`
Merge pull request #215 from bitzesty/minor-rails-enhances

follow rails autoloading rules
More rails autoloading fixes

formatter and declarable are now autoloaded, remove `require` to avoid

`ActiveSupport::Concern::MultipleIncludedBlocks` errors
HMRC FTP server blocking update file downloads

> We have detected that you are using an old web browser that is now
> considered insecure.

Update curb, and remove settings for SSL 3.0 as HMRC have updated the
FTP server to patch POODLE, previously it would *only allow* SSL 3.0
merging master back to tariff-docker