Individual servo delays

Fix for G26 spam output

Add "Level Corners" menu item

* UBL_Language_Update

Translatable strings

* Use slightly better wording...

* Use slightly better wording...

* Disallow filament change while paused

* Use kinematic movemements in pause_print and resume_print

Correcting the storage selection.
Also EEPROM error handling on the LCD.

while heating, G26 will continuously spam the heater states instead of printing it out every 5000ms.

* work around previous regressions...

Prevent damage if DELTA_HEIGHT is set badly

This modify give SERVO_DELAY x servo basis

Miscellaneous style tweaks

Fix Italian string length

Addressing #7264

Support for Geeetech GT2560 Rev.A/Rev.A+

Geeetech I3 Pro X + GT2560 Config

As proposed in #7429

Make audible user script feedback optional

* Fix compilation of ADVANCED_PAUSE_FEATURE without SDSUPPORT

* Fix Identation

* Make use of IS_SD_PRINTING macro

as per @MagoKimbra

Add VScode directory to .gitignore

Update language_de.h v2

Add a parameter to enable/disable audible user script feedback

PlatformIO can be used with VSCode.  VSCode creates a .vscode directory which should be ignored.

Add
MSG_BLTOUCH                    
MSG_DELTA_SETTINGS            
MSG_UBL_MESH_EDIT                
MSG_UBL_OUTPUT_MAP_BACKUP        
MSG_UBL_STEP_BY_STEP_MENU       
MSG_Z_FADE_HEIGHT

Followup cleanup patch

Fix regression in #7428

Update Russian Translation

Clean up whitespace, trailing space, bad tab conversion, etc.

move from legacy precise to trusty build image
fix PATH not including buildroot/bin
remove symolic link to ~/bin
enable sudo

trusty travis image doesn't source ~/bin by default
avr requires sude

TravisCI "trusty" build dist isn't picking up build path causing travis checks to fail.  Reverting to legacy "precise" dist while we investigate

pristine != precise