Based on discovery of bugs around PATH, REMOVE the libdir (it was emp…

…ty anyway) and make the package loader tolerant to an unloadable directory. Release candidate update

Version 0.1, documentation update 2

- Incorporate major proofreading fixes to manual.md and tutorial.md from pull requests jseakle:manual-edit and jseakle:tutorial-edit, by Github user jseakle (Jake Seakle)
- Additional information about branching and version policy in build.md, style.md and README.md.

Finish tutorial, clean up intro, set version to '1.0'.