Added api.jl and broke abaqus_reader.jl

src/api.jl

@@ -0,0 +1,24 @@
+# This file is a part of JuliaFEM.
+# License is MIT: see https://github.com/JuliaFEM/JuliaFEM.jl/blob/master/LICENSE.md
+
+
+type INode{T<:Real}
+    id::Integer
+    coords::Array{T, 1}
+end
+
+type IElement{T<:Real}
+    id::Integer
+    connectivity::Array{T, 1}
+    element_type::AbstractString
+end
+
+
+type INodeset
+    node_ids
+end
+
+type IElementset
+    jotain
+end
+