Rewrite wrappers

[michalhabera]

Clean-up in naming and wrappers generation.

In the old code, wrappers were a separate compiler step, which violated pipelined workflow - it generated code which wrongly

1. didn't comply with templated codes codegeneration/***_template.py,
2. generated code directly from analysis, bypassing IR.

After this rewrite

1. every C generated code should come only from templates,
2. helpers naming of create_*** is made more systematic,
3. helper to create function space takes name of function as an argument, ufc_function_space* create_functionspace_form_poisson_L(const char* function_name). So for command-line workflow a C++ user is presented with e.g.

ufc_function_space* create_functionspace_form_poisson_L(const char* function_name)
{
  ufc_function_space* space = (ufc_function_space*) malloc(sizeof(*space));

if (strcmp(function_name, "v") == 0)
{
    space->create_element = create_element_cddd9e3e151003bf238a36139e064f7fe0542033;
    space->create_dofmap = create_dofmap_cddd9e3e151003bf238a36139e064f7fe0542033;
    space->create_coordinate_mapping = create_coordinate_mapping_a5704bef5087a0d4f18840cff811a6ff1e9b283c;
}
if (strcmp(function_name, "f") == 0)
{
    space->create_element = create_element_cddd9e3e151003bf238a36139e064f7fe0542033;
    space->create_dofmap = create_dofmap_cddd9e3e151003bf238a36139e064f7fe0542033;
    space->create_coordinate_mapping = create_coordinate_mapping_a5704bef5087a0d4f18840cff811a6ff1e9b283c;
}
if (strcmp(function_name, "g") == 0)
{
    space->create_element = create_element_cddd9e3e151003bf238a36139e064f7fe0542033;
    space->create_dofmap = create_dofmap_cddd9e3e151003bf238a36139e064f7fe0542033;
    space->create_coordinate_mapping = create_coordinate_mapping_a5704bef5087a0d4f18840cff811a6ff1e9b283c;
}
return space;

}

[coveralls]

Coverage increased (+1.5%) to 78.693% when pulling ba6d15d on michal/rewrite-wrappers into 687cd93 on master.