Removed installation instructions

> [Warning](https://sublime.wbond.net/installation): Please do not redistribute the install code via another website. It will change with every release. Instead, please link to this page.

& reduced a bit of text.  The README is a bit long IMHO, so anything to condense is best IMHO.
Merge pull request #136 from tomByrer/patch-1

Thank you for your input.