discard leading dots in certificate template extension

the heuristic used by our workflow sometimes fails, resulting in
profile names with leading dots. work around this by discarding
all leading dots...

fixes https://github.com/openxpki/openxpki/issues/195
Fix retrieval of multivalued / clonables in ui, fixes #196
Workaround mysql bind param bug when storing metadata

see #198 - might be reverted after bug is fixed in upstream
Cleanup and modifiy sample profiles