* Add a QMakePackage base class
* Fix sqlite linking bug in qt-creator
* Add latest version of qt-creator
* Add latest version of qwt
* Use raw strings for regular expressions
* Increase minimum required version of qt
* Add comment about specific version of sqlite required
* Fixes for latest version of qwt and qt-creator
* Older versions of Qwt only work with older versions of Qt
* Added check for ppc64le because configure cant guess the build type for rhel on ppc64le
Expand/clarify description of dependency types
Refactored getting the arch so that its less verbose
* Fixed flake8 issues
Package repositories now look like this:
top-level-dir/
repo.yaml
packages/
libelf/
package.py
mpich/
package.py
...
This leaves room at the top level for additional metadata, source,
per-repo configs, indexes, etc., and it makes it easy to see that
something is a spack repo (just look for repo.yaml and packages).
