add separate path_prefix and path_approx hilights
Issue #92 Eliminates system bell errors on osx.

Prepended an 'if' to remove error bell on osx systems.
dollar variable and backslash codes highlighting
Update main-highlighter.zsh

Add support of CDPATH
Merge pull request #122 from shockone/master

Update main-highlighter.zsh
Merge pull request #116 from jameskyle/feature/Issue-#92-silence-system-bell-in-osx

Issue #92 Eliminates system bell errors on osx.
Merge pull request #115 from Valodim/master

add separate path_prefix and path_approx hilights
Update main-highlighter.zsh

Comments added
Merge pull request #123 from Shura0/master

Highlighted dollar variable ver. 2
#155: document path_prefix/path_approx