Move progress bar position when code collapsed. adjust empty space.
Give min-height for paragraph
Less confusing hide/show code, hide/show paragraph button
Compact space between columns
Set paragraph column class programatically, too
Merge branch 'master' into cleaner_paragraph_info
Merge branch 'master' into cleaner_paragraph_info

Conflicts:
	zeppelin-web/app/views/notebooks.html
	zeppelin-web/app/views/paragraph.html
Crunch buttons into setting popup
Adjust margines for iframe mode
Merge pull request #106 from NFLabs/cleaner_paragraph_info

Improve paragraph control buttons, progress bar