initial empty check-in
First commit, version 1 of all packages, with documentation, etc.
Added a subset package to generate subsets of the icons in package form, by automatic generation through interception of regular package use or manually, through a new tool (icon_selector).
Accepted a number of bugfixes and tweaks by Tobias Schueller. The subset packages now have proper TEApot metadata, for example.
Switched to kettle as build system. Note: New branch, until we make this fully official.
Build tweak, added kettle references.