Create 3.3V LDO regulator

We are looking for a cheap 3.3 V LDO regulator:

Must have:
-low idle current for sleep/standby mode
-low Vdrop for usage with a 1c LiPo battery as a power supply (3.6-4.2V)
-Vdrop of 0.4V would be nice.
Update 3.3V LDO regulator
Merge pull request #27 from Chillchamp/master

Added 3,3 V LDO documents