Merge pull request #19 from trishume/master

Fix powerline separators and make them configurable
Add powerline separator documentation to readme
Update readme TOC and Flycheck mode-line feedback screenshot
Typo in readme...
Move auto-highlight-symbol from extensions to packages

Since it is now available in MELPA
Fixes #17 all deps for EDTS are now available in MELPA
Fix URLs of powerline separators screenshots in readme
Tweak powerline height depending on the window-system

Windows: 18
Others: 17
Error in readme for the explanation of C-x b
Don't pair single quotes in lisp
Merge pull request #20 from trishume/package-fixes

Package Config Improvements
Renamed spacemacs-config-disabed-packages to dotspacemacs-excluded-packages

And make it usable for both packages and extensions.
Users should upgrade their .spacemacs file bu adding the definition of
this variable (dotspacemacs-excluded-packages), see .spacemacs.template
Document dotspacemacs-excluded-packages

And create Configuration section in readme
Add troubleshooting for new .spacemacs version
Minor update to readme
Remove rainbow-delimiters from excluded packages in template
Add a note for Emacs 24.4 in readme
Add auto-remove of orphan elpa packages
Fix missing packages in spacemacs-packages

And hack the list of packages for unhealthy dependencies from
ac-js2 mode
Output in *Messages* when no orphan package has been found.