Update C guide: use moo-jump-local instead of helm-semantic-or-imenu
Add notice for helm-semantic-or-imenu about C/C++
Fix a small typo
Update Helm guide for the latest 1.6.5 Helm

- Add fuzzy matching for commands that support it.
- Remove obsolete helm-list-emacs-process.
- Fix typo and add fuzzy matching note for "Why is Helm powerful"
section.
Fix minor face problem
Link my Projectile guide in C/C++ guide
Update Helm's authorship
Fix typo