v1.1b: Tweaked Bf reports, jogging doc, saved another 160 bytes, minor bug fixes

- Increment to v1.1b due to status report tweak.

- Tweaked the buffer state status reports to show bytes and blocks
available, rather than in use. This does not require knowing the buffer
sizes beforehand. It’s implicit.

- Also, since buffer states are not used by most devs (after
inquiries), it is no longer enabled by default and a status mask option
was added for this.

- Fixed some typos and updated for the report tweak in the
documentation.

- Wrote a joystick implementation concept in the jogging markdown
document. Outlines how to get a low-latency feel to a joystick (and
other input devices).

- Removed XON/XOFF support. It’s not used by anyone because of its
inherent problems. Remains in older versions for reference.

- Added a compile option on how to handle the probe position during a
check mode.

- Fixed a jogging bug. If G93 is the modal state before a jogging
motion, the feed rate did not get calculated correctly. Fixed the issue.

- Refactored some code to save another 160+ bytes. Included an improved
float vector comparison macro and reducing a few large and repetitive
function calls.

- Fixed a probing bug (existing in v0.9 too) where the target positions
were not set correct and error handling was improper.

doc/log/commit_log_v1.1.txt

@@ -1,3 +1,26 @@
+----------------
+Date: 2016-09-25
+Author: Sonny Jeon
+Subject: Addressed much larger flash size with avr-gcc v4.9.2. Refactored reports to save 160KB.
+
+- The newest Arduino IDE 1.6.12 has recently updated to avr-gcc v4.9.2.
+Unfortunately, it produces a compiled size almost 0.7KB to 1KB larger
+than prior versions! This can easily cause the base build to exceed the
+Arduino Duemilanove/Nano flash limit of 30.5KB. The Arduino Uno seems
+to be ok still with its 31.5KB flash limit.
+
+- Makefile `-flto` compile flag added to cut down on the horrible flash
+size when using the new avr-gcc. (Edit Makefile and remove comment on
+COMPILE definition). This brings it in-line with what the IDE produces.
+
+- Functionalized repetitive tasks in report.c to try to reduce overall
+flash size. Successfully cut down about 160bytes.
+
+- Removed printFloat_SettingValue() and printFloat_RPMValue()
+functions. These aren’t required and can be replaced with a direct call
+to printFloat() because they don’t require a unit conversion check.
+
+
 ----------------
 Date: 2016-09-24
 Author: Sonny Jeon