Added ctags file

https://github.com/mauro3/julia/blob/edc6ac76ce7fef77c46a7875ea7a0fdb504c9eef/contrib/ctags

Author: mauro3

ctags

@@ -0,0 +1,4 @@
+--langdef=julia
+--langmap=julia:.jl
+--regex-julia=/^[ \t]*(function|macro|abstract type|primitive type|struct|mutable struct|typealias|module)[ \t]+([^ \t({[]+).*$/\2/f,function/
+--regex-julia=/^[ \t]*(([^@#$ \t({[]+)|\(([^@#$ \t({[]+)\)|\((\$)\))[ \t]*(\{.*\})?[ \t]*\([^#]*\)[ \t]*=([^=].*$|$)/\2\3\4/f,function/