Allow fold-code to fold at location

Expands `lt.objs.editor/fold-code` to accept two arguments to fold code
at a line `n` or location `{:line n :ch m}`.

CodeMirror fold options are still not wrapped.
changed bracket selectors so it beats the ones in rainbow/color.css
changed bracket selectors so it beats the ones in rainbow/color.css
Renames #side -> #left-bar
Renames #statusbar-container -> #status-bar
Renames #bottombar -> #bottom-bar
Download via https.

It's safer to download via https; specially considering there is
no checksum test on the tarball to check that it's been tampered with.

See: http://blog.ontoillogical.com/blog/2014/07/28/how-to-take-over-any-java-developer/
add editor conversion
Note on hotkeys for OS X

Some hotkeys are mentioned that are not, by default, the same on OS X. (e.g. ctrl-enter, ctrl-shift-f, possibly more). 

Made a note of this to help new OS X users find the correct hotkey, rather than thread the document with alternative key mappings.
jump-stack.push should use given editor
editor.jump-to should only call jump-to once
Opening an already open path creates a linked doc

Addresses #884
Renames #statusbar -> #status
gst
Renames statusbar -> status-bar in files, ns, and symbols
Renames statusbar behaviors -> status-bar
Merge pull request #1584 from cldwalker/jump-stack-fixes

Jump stack fixes
Merge pull request #1580 from one-more-minute/line-class-conversion

Editor conversion for +/-line-class
Merge pull request #1583 from gekkoe/patch-2

Note on hotkeys for OS X
Merge pull request #1574 from joshuafcole/refactor/css-rename

Refactor/css rename