- add eclipse project configuration

- use espressif ADF, remove external opus rep
  o uses audio pipelines now
- change code to use flac decoder
- remove mersus code
- add first try of audio synchronization
  o needed to sync timeofday to server on reception of server settings to avoid overflows in timeval calculations (int32_t on esp32 SDK)
  o still a lot of TODO's in the code, but it's almost in sync, although there is quite some chunk skipping which I am currently working on

components/dsp_processor/include/dsp_processor.h

@@ -1,36 +0,0 @@
-#ifndef _DSP_PROCESSOR_H_
-#define _DSP_PROCESSOR_H_
-
-enum dspFlows {dspfStereo, dspfBiamp, dspf2DOT1, dspfFunkyHonda };
-
-size_t write_ringbuf(const uint8_t *data, size_t size);
-
-void dsp_i2s_task_init(uint32_t sample_rate,bool slave);
-
-void dsp_i2s_task_deinit(void);
-
-enum filtertypes { LPF, HPF, BPF, BPF0DB, NOTCH,
-                   ALLPASS360, ALLPASS180, PEAKINGEQ,
-                   LOWSHELF, HIGHSHELF};
-
-// Process node
-typedef struct ptype {
-  int filtertype;
-  float freq;
-  float gain;
-  float q;
-  float *in,*out;
-  float coeffs[5];
-  float w[2];
-} ptype_t;
-
-// Process flow
-typedef struct pnode {
-    ptype_t process;
-    struct pnode *next;
-} pnode_t;
-
-void dsp_setup_flow(double freq,uint32_t samplerate);
-void dsp_set_xoverfreq(uint8_t, uint8_t, uint32_t ); 
-
-#endif /* _DSP_PROCESSOR_H_  */