renamed unused variables properly
Add translation for Romanian.
FEATURE: Add a plugin callback when editing a post

FIX: Wrap PostRevisor database work in a transaction
FIX: Support J/K bindings on German Keyboards

J/K are not supported on German keyboards, shift+j and shift+k have been added to remedy this.
https://meta.discourse.org/t/keyboard-shortcuts-for-next-previous-section-do-not-work-with-german-keyboard-layout/18902
Change SHIFT+J and SHIFT+K to move up/down sections instead of posts.
FIX: Markdown parser: empty links and bbcode parsed as link refs
FEATURE: Badge query validation, preview results, and EXPLAIN

Upon saving a badge or requesting a badge result preview,
BadgeGranter.contract_checks! will examine the provided badge SQL for
some contractual obligations - namely, the returned columns and use of
trigger parameters.

Saving the badge is wrapped in a transaction to make this easier, by
raising ActiveRecord::Rollback on a detected violation.

On the client, a modal view is added for the badge query sample run
results, named admin-badge-preview.
The preview action is moved up to the route.
The save action, on failure, triggers a 'saveError' action (also in the
route).

The preview action gains a new parameter, 'explain', which will give the
output of an EXPLAIN query for the badge sql, which can be used by forum
admins to estimate the cost of their badge queries.
The preview link is replaced by two links, one which omits (false) and
includes (true) the EXPLAIN query.

The Badge.save() method is amended to propogate errors.

Badge::Trigger gets some utility methods for use in the
BadgeGranter.contract_checks! method.

Additionally, extra checks outside of BadgeGranter.contract_checks! are
added in the preview() method, to cover cases of null granted_at
columns.

An uninitialized variable path is removed in the backfill() method.

TODO - it would be nice to be able to get the actual names of all
columns the provided query returns, so we could give more errors
FIX: Remove the old keyboard bindings for next/prev section, update client.en.yml to reflect the new bindings
FIX: Readd the dismiss keybindings
https://meta.discourse.org/t/new-updated-bar-and-dismiss-new-button-unreachable-by-keyboard/18946/10?u=cpradio
Fix magic numbers, extra param references
FIX: Duplicate badge titles can still occur
Send false instead of true to .uniq as the badges are not sorted.
https://meta.discourse.org/t/set-title-dialog-shows-multiple-instances-of-the-same-badge-2/19495
Merge pull request #2736 from cpradio/fix-duplicate-badge-titles

FIX: Duplicate badge titles can still occur
Merge pull request #2725 from cpradio/german-keyboard-support

FIX: Support J/K bindings on German Keyboards
Merge pull request #2717 from riking/badge-solid

Admin badge interface improvements
Merge pull request #2674 from akshaymohite/optimization-fixes

renamed unused variables properly
FIX: couldn't start a 4-spaces block on the first line of a post
correct copy for db_shared_buffers
Merge pull request #2737 from techAPJ/patch-3

correct copy for db_shared_buffers
wrong syntax of ruby on contributing.md fixed
improvements to admin quick start guide