Disable indent corrections for specializations of text.html

Previously we disabled it for “text” except “text.html”, which would mean it was also enabled e.g. for “text.html.markdown” (undesired). We now only make “text.html.basic” the exception.
Remove exclusion for text.html.basic

Previously we excluded `text.html` from this setting but this is no longer necessary as it has it's own value now.
Point to ruby 1.8 shim

Using a shim allows us to catch when 1.8 of ruby is not present and provide other options.

#ignore
Merge textmate/master