initial implementation of LOMB
[statistic] working estimation for LOMB for amplitude; phase still open
[statistic] implemented tests for LOMB
added LOMB sample script
added example for LOMB
[data] initial implementation of LOMB into Data object
Merge branch 'master' into lomb
minor
[statistic] moved statistic in separate directory
[statistic] moved lomb in separate file
[lomb] implemented return of data object and additional tests
adapted LOMB and started more thorough way to check license check
[license] modified license test and added license header to a lot of files
[test][bugfix] fixed some non working tests