Options for start and end paused

[dronus]

Adds options to pause at first frame (written some time ago by bholmes451) and the last frame.

Pausing on first frame allow a player to start fast when needed on files that require some preloading, and start mulitple players running synchronously.

Pausing at the the last frame prevents the console to reappear and the audience to leave the room unnerded :-). It also allow for more complex schemes where two layered omxplayers are used for seamless playback of multiple files.

[dronus]

I think that where some relics from an earlier implementation. Removed them.

[dronus]

Will also close #538 and #659 if merged.

[toozie21]

I am working on a home project that could use these additions. Since it isn't merged in, I will need to build it myself locally, are there any issues with that? Seemed like a simple enough change, so I got worried there was a reason the PR was still sitting open.

[heeplr]

Is there a reason this isn't merged, yet? The code seems trivial and those features would vastly improve asynchronous control of omxplayer.

[avrovulcanxh607]

As those above have commented, a really useful feature here, why hasn't it been merged yet? Really want this feature for an upcoming project

[devcshort]

Really sucks this hasn't been merged yet. I also have a need for it.

[ASkirrow]

A great addition. Without it i'm gonna have to ditch omxplayer on my projects. Essential to pause at the end of the media. Any other work around to get this happening. I've tried to compile the new line but get bogged down with library error etc :-(

[smadds]

Please can someone merge this fork back? Compiling the branch has so many errors, I just cant get it to install on my RPi

[schicki0815]

Please merge the functions start-pause und end-paused back. The functions are very simple but helpful. Thanks