GCS: Remove ResponseTime fields

This was part of something that should not have been merged in.  Input
shaping for the gimbal is performed within the CameraStab module.

fixes #195
Camera Stab: Implement an intput filter for attitude mode

It doesn't make sense to have the input filter for axis lock
mode since integrating is already a big low pass filter.  This
can slow the response for changes in desired attitude though.
Camera Stab: Move the Accel and Deccel time into the Camera settings

Previously this module was reusing some of the variables from the mixer
settings but since these are independent variable uses no reason to
confound them like that.
Camera Stab: Simplify the feedforward code

Use a single time constant for positive and negative acceleration
since servos aren't like motors in this regard.
Camera Stab: Only get the settings when they are changed

This is more efficient than getting it every time
Updated .gitignore file.
MPU6000: Stop driver when fifo overflows

The driver should _never_ lose sync since it cannot recover so
stop sending any data instead of phase shifted data.  There should
be code to recover the driver after this.
Camera Stabilization: Update comments and code documentation
Camera Stab: Use the library bound function
Merge pull request #219 from TauLabs/kenz/gitignore_update

Updated .gitignore file.
MPU6050: Stop driver when fifo overflows

The driver should _never_ lose sync since it cannot recover so
stop sending any data instead of phase shifted data.  There should
be code to recover the driver after this.
MPU60X0: Use a labeled PIOS_MPU60X0_INT_STATUS_OVERFLOW flag

Crytic unlabeled constants like 0x10 are bad.  Also there was a
flag that was defined but unused and also didn't match the
datasheet (PIOS_MPU60X0_INT_STATUS_FIFO_FULL) so I removed it.
Merge pull request #234 from peabody124/mpu6000_overflow

MPU6000: Stop driver when fifo overflows
Android Tuning: Add RateKd slider

Using a max of 0.001 which should be reasonable from the
values I've heard.

Fixes #248
Android Tuning: Forgot to add load button to tablet layout
quanton: fixed dma settings for SPI1 and SPI2
quanton: remove unsued SPI DMA irq handlers
Merge pull request #252 from lilvinz/quanton_dma_fix

quanton: fixed dma settings for SPI1 and SPI2
Update hardware/Production/FlyingF3/pinout.txt

Made channel assignment text clearer.
Changed properties of labels to make text selectable.