Made MidicaPLParser more robust against wrong charsets in text-based …

…messages

The following scenario caused a fatal error in step 3:
1: importing a MIDI file with chinese UTF-8 characters as ISO
2: exporting the result as MPL
3: re-importing the resulting MPL
This was caused by a regex not working correctly with the wrong encoding.
Fixed by replacing the regex by startsWith() and endsWith()

small bugfixes and improvements

- bugfix in the MIDI exporter (fixed a rare problem with wrong midi data)
- added some key bindings

keeping tooltips open for a longer time

fixed exporter bugs and unified newline symbols in META messages

- bugfix in MidicaPLExporter
- bugfix in AldaExporter
- optimized handling of different newline symbols in META messages
  - display of newlines in FlowLabels
  - meta messages in MidicaPLExporter

minor bugfixes

added support for ALDA 2

- alda import: checking ALDA version on the system
- alda export: exporting only ALDA 2
- converted all midica.org links from http to https
- bugfixes in the decompiler
- bugfixes in the MidicaPLParser
- fixed #73

added support for compact syntax and barlines to the decompiler

- added support for MidicaPL compact syntax in the decompiler
- added support for barlines for decompilation to MPL and ALDA
- added additional line breaks in both formats (elements per line is configurable)
- fixed some bugs in the decompiler
- fixed #80

compact syntax supports more options (q, m, tr)

- fixes #79

Added bar lines with checking functionality

- fixed #74

Added support for percussion instruments in predefined chords

- fixes #75