Minor improvements, buxfixes, error handling.
Updated build information in README.cmake: -DBUILD_DASHBOARD_REPORTS=ON
add comment about ignoring the idx
Merge pull request #1517 from lambday/feature/log_determinant

minor changes and added unit-test (log-det)
updated ruby modular to use nmatrix, initial commit
added ECG source separation notebook
Merge pull request #1520 from pickle27/develop

added ECG source separation notebook
some minor changes for readiability and style
Merge pull request #1521 from karlnapf/develop

some minor changes
Merge pull request #1510 from tklein23/minor_fixes

Minor improvements, buxfixes, error handling, documentation.
fix travis faliures via new integration test data
Merge pull request #1522 from karlnapf/develop

set new data version
Pending minor fixes.
Removing code duplication by proper templating&specialization.
Merge pull request #1526 from tklein23/minor_fixes

Pending minor fixes.
some changes in the debug functions
change in debug function
Merge pull request #1527 from karlnapf/develop

Some updates to debug messages
added bundle colpack option to cmake
some more updates on debug functions