fix comments on spaceship example

The comments explaining the if..else part were mistaken.
Merge pull request #2042 from jaimeiniesta/patch-1

fix comments on spaceship example
Modified Keyboard Reprogram example

Updated to reflect changes with how the IDE creates new blank sketches.
Match return value to type in available()
Updated Blink

removed the variable “led” and added some additional descriptive text
Fix idle level when initializing a inverted SoftwareSerial

Previously, when SoftwareSerial was initialized, it would always be set
to an idle level of HIGH, even when inverted logic was enabled. Once a
byte is transmitted, the idle level gets correctly set to LOW instead.
This commit makes sure that the idle level is correct directly after
initialization already.

This fixes #1361.
Merge pull request #2090 from jenscski/master-fix-1361

Bug in SoftwareSerial when using inverse logic
Merge pull request #2057 from zfields/patch-1

Match return value to type in available()
Backported Print class from ide-1.5.x branch

Close #1951
improved USB write speeds
Fix race condition in USB CDC transmit

If the Start of Frame interrupt triggers just after the call
to USB_SendSpace in USB_Send then we can get data loss.
When the first bank is full and the second partially full,
the SOF handler will release the second bank via USB_Flush.
Data is then lost due to overflow as USB_Send continues writing data
to the now-closed bank.

Fix this by re-checking the FIFO status inside LockEP, immediately before
doing the data write.

Signed-off-by: Paul Brook <paul@nowt.org>
Improve CDC read code

Read CDC data from USB FIFO on demand instead of in ISR.
Remove superfluous ring buffer.

Signed-off-by: Paul Brook <paul@nowt.org>
Fix of a bug

Stream::find(char *target) passes NULL as “terminator” to Stream::findUntil(char *target, char *terminator), which immediately dereferences it by passing it on to strlen():
 
bool Stream::find(char *target)
{
  return findUntil(target, NULL);
}
 
// as find but search ends if the terminator string is found
bool Stream::findUntil(char *target, char *terminator)
{
  return findUntil(target, strlen(target), terminator, strlen(terminator));
}
Fix of a bug

Stream::find(char *target) passes NULL as “terminator” to Stream::findUntil(char *target, char *terminator), which immediately dereferences it by passing it on to strlen() :
 
bool Stream::find(char *target)
{
  return findUntil(target, NULL);
}
 
// as find but search ends if the terminator string is found
bool Stream::findUntil(char *target, char *terminator)
{
  return findUntil(target, strlen(target), terminator, strlen(terminator));
}
USB CDC available() method returns correct number of bytes in buffer.

See #1953
Merge pull request #2104 from amulya349/master

Fix of a bug in Stream.cpp
Fixed error in comment
Merge pull request #2117 from amulya349/master

Fixed mistake in comment
corrected wrong path to firmware binaries in wifishield upgrade script for mac
Update USBAPI.h

Fixes bug where Serial.read() would always return 0 as the first byte.