adding global gitignore for KDevelop4
adding global gitignore for KDevelop4

KDevelop4 is the C/C++-IDE from the KDE desktop.
It creates a directory '.kdev4' and a hidden file
<projectname>.kdev4 in the project's root directory.

chhsieh/gitTest_1,szymanskirafal/gitignore,bruennijs/ise.cppworkshop,chhsieh/helloworld,szymanskirafal/gitignore,bruennijs/ise.cppworkshop,szymanskirafal/gitignore,bruennijs/ise.cppworkshop