README: added build instructions.
Added Flash Builder Project

Added default git ignores for Flash projects
RTSPClient: Only read RTSP response body if it exists

Only read the RTSP response body if the 'Content-Length' header
is set. Otherwise there is a risk that we read and discard
initial video data.
README: Added draft note about API

Change-Id: Ic7dcfe8a64cd00c87a46c99576e0bab245718042
README: Clarified descriptions and fixed spelling errors

Change-Id: Iaf5961e36aa78d5ea5b79e98de15d9b9b0b53514
Corrected data pushing logic

  * NALU; use 4 bytes to describe size. Using only 2 bytes would
    overflow if a NALU was larger than 0xffff, which is common
    for reference picture when resolution is in the full-hd ranges.

  * FLVMux; push the metadata tag so it isn't mistaken for the
    beginning of a video/audio tag.

  * Removed unused function.