Fix h5 following library changes
Divide transport into appropriate files

Put functions of the initial transport files to the appropriate places in
wien2k_converter and sumk_dft_tools
Case Sigma=0 included (LDA_only)

Some other minor corrections.
Change names, correct some issues in merge

Simplify writing/reading from h5
API changes
Added new test case for transport code, some other minor changes
Add transport test to CMakeLists.txt
Delete obsolete SumK_Transport files
Minor fixes, all tests now pass
Minor changes lost in rebase