Fix bug in Ticker code

The bug was introduced by the interrupt chaining code.
Merge pull request #38 from ytsuboi/master

Added LPC1114 support and fixed hard fault
Merge remote-tracking branch 'github/master'
Add script to export mbed SDK tests to different IDEs
Added LPC1114 in the official release list
fs: Silence GCC signed/unsigned warnings

The SDFileSystem class contained a few routines which compared a signed
integer loop index to an unsigned integer length/size.  I switched the
loop index to be uint32_t as well.
Merge pull request #39 from adamgreen/fsGccWarnSilence

fs: Silence GCC signed/unsigned warnings