Make the hotkey code a bit less bloated
Debloat and slightly speed up the MRU code
Clean up the json parser a little
Eliminate a pointless std::map in charset_conv
Store open dialogs in an unsorted vector

Even if every dialog in the program was open at once, linearly searching
a vector is quite fast enough.
Remove some cruft from the fonts collector
Fix SRT timestamp parsing
Clean up the SRT reader/writer a bit
Swallow spam from coveralls submission
Move AssTime to libaegisub and add tests
Add character counter tests
Add simple tests for agi::Split
Store hotkeys in a less dumb format
Remove unused test util functions
Update Indonesian translation
Slightly optimize AssDialogue serialization
Install the unicode-compatible Lua module loader before loading moonscript

Closes #1760.