gemview

0.5.2 release

Fix preformatted regression caused by new gemtext parser

The old parser always inserted an empty newline at the end of every preformatted block
This was being compensated for by truncating the block by one character
Without the trailing newline, this was truncating the fina non-whitespace character of every preformatted block
The fix removes the truncation.
- Bonus - the variable is now immutable.

add connect_request_input_sensitive method
use colored icons next to links to show different protocols
link rendering - common code moved into traits for re-use
add initial support for Spartan protocol
add connect_request_upload method
gemini::parser - add Spartan prompt line support
finish Spartan upload support
Gemini/Spartan - double check file mime type and attempt to handle in application before falling back to downloading
Gemini - rewrite of parser
- Consecutive blockquote lines are grouped together
- Reduced allocations by specifying lifetimes for &str's
- main parser loop is significantly shorter, with no nested loop