add jgit feature
add jgit feature

Signed-off-by: Shawn O. Pearce <f01032651c12a22b2103346ba96b3b6b231f9d3c@spearce.org>

paulvi/egit,bols-blue/eclipse_maven_autobuild_sample,collaborative-modeling/egit,collaborative-modeling/egit,spearce/egit,bols-blue/eclipse_maven_autobuild_sample,rickard-von-essen/egit,SmithAndr/egit,rickard-von-essen/egit,spearce/egit,mdoninger/egit,paulvi/egit,blizzy78/egit,chalstrick/egit,jdcasey/EGit,wdliu/egit,SmithAndr/egit,wdliu/egit,jdcasey/EGit