Instant IDE

#21
Feature Suggestions:

* Ability to open a file as "READ ONLY" so that it can't accidentally be changed. Several times I've accidentally made changes in the wrong tab and saved those changes.

* Ability to reload the contents of a tab without having to close it, find the file and reopen it.

* Ability to specify that only "x" number of lines from the file are shown and reverse the order. Specifically, I would like to open the ERROR_LOG file and see only the last 20 or 30 lines in READ ONLY mode with the newest line at the top.

* Ability to open up a separate console tab instead of it being at the bottom.