more warnings
gitignore updated
fixed some errors from static analyzer
fixed code formatting
tap_rotspeak - cleanup
restored fltk-config
Bug #175: Completed quoting for parameters of some CMake commands

A Wiki article pointed out that whitespace will only be preserved for parameters
in CMake commands if passed strings will be appropriately quoted or escaped.
http://cmake.org/Wiki/CMake/Language_Syntax#CMake_splits_arguments_unless_you_use_quotation_marks_or_escapes.

Quoting was added so that more places should also handle file names correctly
which contain space characters eventually.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Remove remaining files from Covers.
Added scales
Refreshed all translation files
Fix a segmentation fault

Fix the segmentation fault caused by clicking on the "Cancel" button of the export dialog, as in issue #249.
Merge pull request #278 from M374LX/stable-0.4

Fix a segmentation fault
ComboBox: more checks for valid model + coding style

Before accessing the model, we have to check whether it is valid at all
in order to avoid a crash.

Closes #273.
Merge pull request #270 from zonkmachine/ghost-files

Remove remaining files from Covers. Fixes #264
Merge pull request #271 from zonkmachine/chromatic-scale

Added scales (chromatic scale again)
SongEditor: remove unused messing with engine's pointer to SongEditor

Back in time we obviously didn't manage to get construction dependencies
sorted so we needed to mess with the pointer to the SongEditor instance in
the engine class.

Thanks to Alexandre Almeida for pointing out this issue.

Closes #261.
VstEffect: added NULL pointer check in closePlugin()

We must not call methods on m_plugin in case there's no valid instance
e.g. due to missing DLL files.

Closes #245.
FxMixer, Mixer, AudioPort: minor coding style fixes
EffectChain: new argument hasInputNoise for processAudioBuffer()

Use the extra information to determine whether we need to process input
at all if plugin is not running anymore.

In FX mixer we now omit starting effects if no data has been mixed to
a certain FX channel. Instead let effects running until they finished.

First of multiple fixes for #267.
MixHelpers: added isSilent()

A simple function for testing whether a given sample buffer is silent.
Maybe we have to adjust/lower the threshold.