acceleration-Grbl now works with atmega 168 by disabling arc motion
fixed null pointer dereference in planner_forward_pass_kernel
fix sign of fractional part in printFloat
Reset the overflow flag to stop a queued overflow interrupt from resetting the step pulse right after sei() is called
Make sure we don't accelerate above the nominal_rate
Merge pull request #32 from jv4779/master

minor grbl code issues
Updated README and reordered branch versions.
Various minor updates and variable definition corrections. Removed deprecated acceleration manager.

- Removed deprecated acceleration manager (non-functional since v0.7b)
- Updated variable types and function headers. - Updated stepper
interrupt to ISR() from SIGNAL()+sei(). - General code cleanup.
Propagated premature step end bug fix from the edge branch. Updated printFloat() function.

- Will not be uploading a hex build of this, unless asked.
Merge chamnit/v0_7 with grbl/master
Merge pull request #47 from chamnit/v0_7

Merging chamnit/v0_7 to grbl/master
Update readme.textile
Updated streaming scripts. Compiler compatibility for _delay_ms().

- Moved obsolete streaming scripts to folder for reference.

- Added a more complex Python streaming script which uses the serial
buffer as an additional streaming buffer.

- Removed all references to a _delay_ms(variable) to allow for better
porting across different compilers.
printFloat rounding fix. Affected settings. Recommend using new build.

printFloat was printing incorrectly and adding a value of 5 to every
float instead of 0.0005 when rounding to 3 decimal places. The printed
settings values do not accurately portray the actual stored value.
Recommend using newly posted build.
Minor compiler compatibility update for _delay_us().
Fix to enable spindle DDR ports.
Merge v0.8 edge to master
Merge error fix.
G28/G30 post move bug fix.

- Fixed a bug when after moving to a pre-defined position G28/G30, the
next move would go someplace unexpected. The g-code parser position
vector wasn't getting updated.
Added builds folder.

Because the Downloads section has been removed, added a builds folder
for users to download pre-compiled firmware without needing to compile
it themselves.