Corrected CSS values for Flexbox model for official CSS3 & for IE.
Missed one before. Now using the official setting for display.
Merge pull request #205 from arlobelshee/fixing_ie_support

Fixing ie support
Updated the flex styles to bias to auto size, rather than 0 size. Since the bias is only used by IE (though part of the standard), this was causing a break in IE but "worked" in current versions of other browsers...for now.
Minimal CSS change to accomplish goal. Also make all terminal windows use same div nesting. This fixes a bug where IE displays the title bar at 0 height for modal dialogs, but OK height for other terminal windows. Not sure exactly why, but just being uniform made it go away, so good enough.
Merge pull request #208 from arlobelshee/ie-finish-fixes

Ie finish fixes
PR #208 replace tabs with spaces in template
spell check
Merge pull request #211 from poem/master

spell check
"orden" was mispelled as "oren"
Merge pull request #212 from mgarciaisaia/patch-1

Spanish translation typo
translate one leftover sentence
translate leftover instructions
Fix typos
complete all zh_CN nodes
translate some leftover sentence
Merge pull request #217 from qiansen1386/master

Chinese translations
Corregidos errores ortográficos (ES)
Merge pull request #218 from AbelAlejandro/patch-1

Corregidos errores ortográficos (ES)
Lesson names and descriptions updated for all levels in Japanese. Also, initial translation of Clone introduction into Japanese complete