Add eagle files and images for DLY, HPF, LPF, PRE, SPL, SUM

Add JMP 2.0 eagle files and images

Update tetraBoards_Uebersicht_Beschreibung Add missing boards to the table

Delete backup files

Add new tetra-Board and arduino files Add AMP_1_0, AVC_1_0, D18_1_1, IOP_1_2, MIC_1_0, PIN_1_1, POT_1_0, PWA_1_0, PWR_1_0, RGF 2.0, SOC_2_0, VLT_1_0 Add mex_nano_shield_keyboard, mex_nano_shied_numbers New arduino projects

Missing doc files added, schematics.pdf created +doc/pdf/schematics.pdf: all schematics in one file

IOP 1.0 added

tetraBoards_Uebersicht corrected some names

tetraBoards_Uebersicht updated with categories

tetraBoards_Uebersicht updated