Merge pull request #148 from xtech86/master

Clarified if installed check.
JEvents 3.1.15
jquery problem workaround
new flat layout
JEvents 3.1.15
jquery problem workaround
new flat layout
JEvents 3.1.15
jquery problem workaround
new flat layout
Simple fix for issues 
Fixes upstream/master#159
Signed-off-by: xtech86 <tony@xtech.im>