Update code to latest template

Add pre-commit hook to automate local testing for commits

Checks the current branch to figure out when the commit is on a
rebase or other branchless path, and skips tests while warning
the user that tests were skipped.

Previously, the description was ambiguous with regards to upstream
changes to the `pre-commit` script.

Exit early in case of empty commit so the user doesn't have
to sit through the tests.

Inform user when tests start, when builds fail, and reminds them
they can use --no-verify if they want to commit even when the
commit has failed tests for some reason.

No longer mentions setting up alises and now mentions the
possibility of using cp instead of a symbolic link.

Prevents issue where the hook would attempt to unstash changes from
unrelated stashes, possibly causing loss of work.

Previous behaviour would exit with the exit code for echo, making
the script exit with the wrong behaviour and thus allow commits
from going through despite failing tests.

Automates the process of making a commit and verifies that the
staged changes really don't break things.

Adds instructions for using the pre-commit hook to CONTRIBUTING.md

When a keypress is inserted into the hashmap, it should be marked as
`NotQueried`.

Upgrade specs to 0.8 in engine/examples
Also adds threadpool and ticketed_lock as dependency.

* Ignore Intellij IDEA project files

This commit adds "*.iml" and ".idea" to the git ignore file.

* Remove slash from ".idea"

Because the old code does not work, which might turn away people who want to give it a quick try

Profile Application::advance_frame using thread_profiler

Add a screenshot for relevant examples

* Test amethyst both with and without profiler feature enabled in CI.

* Update CONTRIBUTING.md

* Update CONTRIBUTING.md to include a section about profiling.
* Save profiling info to thread_profile.json file living in the same
  directory as Cargo.toml.

Fix deferred rendering in renderable example

Fix crlf normalization on extensionless files

Previous behaviour ignored text files with no extensions, now
exlicitly adds the offending LICENSE-APACHE and COPYING files to
the .gitattributes; also changes their line endings.

* Change to lowercase in CONTRIBUTING.md

* Update CHANGELOG.md

* Simplify line in CHANGELOG.md

Use fnv hasher for HashMap and HashSet.

Appveyor build failure fix

* Set UNCERTAINTY to 5%

Clippy fixes