Timer 9 configuration code added in order to emulate HREF signal, which seems to does not work on OV7670 module. Code for timers must be expanded to implement configuration with 2 synchronized timers on VSYNC event.
TIM3 is used in synchronization mode with camera VSYNC signal for generating reference levels for TIM9, which will actually produce synchronized HREF signal.

TIM3 waveform is implemented in this commit.

cmsis_boot/system_stm32f4xx.c added to provide version control for CoIDE. Makefile used in Linux environment may use this source, instead one in root project directory.