v0.1.620

Pre-release of RIDE 2.0

Changes:
disabled enter in autocompletion
"Connect" uses host:port from the form on the right
in debugger steps into instead of over
added shortcuts for BK and FD in the debugger
renamed "saveAndClose()" to "EP()"
rm keybindings for features that won't be in v14.1
remove unrequired parts
Icons on Windows & OS X now work.
first stab at syntax highlighting
moved require()-s to top
left arrow in submenu should focus parent menu
updated all mentions of "RideJS" to "ride"
improved release script