tutorial stubs
Added missing VERSION file. Necessary to compile documentation (and possibly to make pip behave)
What is TROY (draft)
Refiniment architecture subsection.
Why TROY
use cleaner VERSION detection
fix setup py -- that change belonged to a different branch
Uniform docuemntation and installation practice across RADICAL software stack
Configuration instructions adapted from saga-pilot documentation.
Further refinement to the introduction.
Stub for configuration chapter
Update index to include installation and configuration
Merge branch 'devel' into feature/documentation