in order to make #inpect to not blow up
screen wher controller with request and helpers
included in instance of the ViewModel

…endency

bump cells-erb dev dependency to >= 0.1.0

README: Build badge point to trailblazer/cells

Ruby 2.2 is reaching it's end of life at the end of the month. But I
think it's useful to test recent Ruby versions as well.

Update tested Ruby version

Add concise #inspect to ViewModel

Fix warning for undefined instance variable

Tilt::Cache is a generic key-value store. This works exactly the
same, if we move some code around.

The find loop is necessary to find out which prefix contains the
template that we are looking for.

Template parsing happens for the first template that is found.

If we split the file lookup and template building, the code becomes
easier to read and easier to maintain.

Tilt cache

Drop support for old rubies