fixed #238 - don’t trigger events for eclipsed morphs

(whose parent-chain contains a hidden morph)
Prevent „hide“ menu option for non-palette template blocks

thanks, Brian, for reporting this glitch!
Catalan translation, thanks, Bernat Romagosa Carrasquer!
Disallow "ringify" option for inline-template blocks
Add localization to Edit Slot Options text.
Correct typo and add a few Portuguese translations for 'unofficial' strings.
Add localize calls to a bunch of strings.
Update last_changed value.
Make menu item text similar to other picture generating itens.
Add a few new strings to Portuguese translations.
fixed #125 (encode email address when signing up)

thanks, Nathan!
fixed #207 (stricter comparison of strings vs. numbers)

Some intentional edge cases remain, such as empty string equals zero
and disregarding trailing / leading blanks. Please don’t nitpick and
spare me the fundamentalism, plus discussing whether discussing the
discussing qualifies as fundamentalism :-)
fixed #245 (consistently auto-convert empty strings to zeroes)
Merge pull request #241 from MMSequeira/master

Added localize() calls to a bunch of missing strings and added also a bunch of Portuguese translations to 'unofficially' localized strings.
Localization update
Catalan translation update - Thanks, Bernat!
fixed #175 - Text comparisons are now case sensitive
fixed # 179

don’t identify primitive (static) C-Slots as implicit formal parameters
fixed #249 - preserve variable value types with edge cases

(empty string, Boolean false)
Threads: fixed #133 - preserve edge-cased argument types

(empty string, Boolean false)