L1page dev

• everything related to dependencies is moved to https://gitlab.cern.ch/cactus/cc7-l1ce-ready (downloads and packs rpms as artifacts and creates docker image for l1page/l1ce CI); this in order to avoid CI building environment to diverge from p5 (closes #49 (closed))
• cleaned Makefile in order to cover only configuration, installation, and rpm creation stages
• optimized CI: the test stage now depends on the test-build and uses its artifacts (usable also as test rpm within 1 day lifetime)
• configuration templates put in the setup folder: the config folder contains only the host configuration files in their final form
• unified configuration scripts: all steps performed through changeConfig.sh
• disentangled runtime settings from host configuration; runtime settings now located in the settings directory
• simplified installation for development purposes
• updated documentation
• updated admins e-groups

closes #39 (closed) closes #48 (closed) closes #49 (closed)