Added energy_power_engine_network_gas to defaults
Node position in graph layout
Added gas engine to bulk_update script
Merge pull request #695 from quintel/wartsilla

Add gas engine plant input defaults to the bulk update script
Update to Rails 4.1

Adds "require: false" to shoulda-matchers to silence a message about
minitest.
Merge pull request #696 from quintel/rails-4.1

Update ETEngine to Rails 4.1
Show full exception when running test GQL
Overhaul error handling in the GQL module

* Introduce GQL::Command, which wraps around a GQL statement and creates
  the Proc which can be executed by Rubel. This allows us to retain
  information useful for debugging, such as the query string which is
  being executed, the file and line in which it is defined, etc.

* Replace Input#rubel and Gquery#rubel with Input#command and
  Gquery#command.

* Adds CommandAttributes which provides the "command_for" helper.
  Converts an input or gquery attribute into a GQL command.

* Added "file_path" to Input.

* GQL#rubel_execute will wrap exceptions with a CommandError. This
  replaces the "backtrace" method with strings containing the .ad file
  in which a failed query is found.
Add Gql::Gql#inspect

The output to the default "inspect" was unreadable.
Preserve "to_s" from the original exception
"fetch_and_rescue" becomes "fetch"

We will no longer catch and ignore exceptions which occur inside "fetch"
blocks, instead allowing the exceptions to be handled normally. This has
been done since the old behavior makes debugging particularly hard
(since any failed calculation can result in a "nil", with no idea of
where that nil originated).
Fix "command_for" in Ruby 1.9.3
Send a full backtrace to API responses
Update Atlas to quintel/atlas@01e213c
Send query error backtraces to API responses
Merge pull request #687 from quintel/error-handling

Destroy "rescue nil"!
Update Atlas to quintel/atlas@ee24e16

Adds compatibility with the latest version of Rubel. Ensure that the
correct Rubel version is also installed.
Fix formatting of group name in balance error messages
Fixes for when a query string is "nil"
Fix formatting of percentages in converter data

Closes quintel/etmodel#1684