bugfix for pica_map to check for occurrence
Merge pull request #17 from jorol/bugfix_occurrence

bugfix for pica_map to check for occurrence
new function parse_pica_path
test with Perl 5.20
fix parsing empty subfields
move parse_pica_path to PICA::Data
new function pica_values
lower requirement of XML::LibXML
more PICA access methods
refactored
refactoring with PICA::Path
remove PICA::Data as independent module
migrate to Dist::Milla
include build files
0.15
refer to PICA::Data
Merge remote-tracking branch 'gbv/master'