New: Implement basic MSTS cabview parser

[leezer3]

This branch implements an incomplete MSTS cabview parser.

Supported:

• Power & brake handles. (Basic config only- Both engine and loco brake levers work together)
• Ammeter (Uses the BVE power related bodge, not 'real')
• Brake pipe/ brake cylinder gauges

TODO:

• Tweak the current parser, so that subject transform and element config form part of the base loader, rather than being duplicated in each file.
• Add appropriate error message if the power/ brake notches in the CVF don't match that in the train.

[leezer3]

Oops, makefile not updated, hence why Travis is falling over.

Will fix tomorrow.

[leezer3]

Redone in the block reader style.
c3d05af needed: Quote-enclosed strings seem to be common in CVF files, whereas shape files are 99% binary.

Flaws at present (Incomplete list):

• No loco brake; New: Add independant loco brake #241 , this is currently hooked to the main brake.
• Need to implement the MSTS ammeter (Requires parsing the .eng files)
• No warnings etc. if the number of notches don't match (Again, parse the .eng files)
• No AWS/ TPWS/ US signalling: It'd actually be useful to port this from BVEC_ATS to the inbuilt systems for BVE trains on Linux. Could also include BVEC_ATS and use it to run the plugin for MSTS?
• No vaccum brake support, just uses the air brake values.
• No headlight support. Key config is enabled for plugins, so we really want a global variable (Accessible through runtime). This will also be helpful in later external animations.
• Need to check the DirIncrease and Direction values for exact behaviour.
• No support for textual font stuff.
• Style value not supported- Need to also implement sprung controls into the main sim.

[leezer3]

Now train plugins are available, this needs to be moved into it's own plugin, and a parser implemented for the consist files and the ENG files.

All of these follow the same basic principle / token block method, so it's do-able with relatively little code, but check our missing features list above?!

[leezer3]

Closing this in favour of #684