Don't require separartor to be appended for eatFirst* to work

Previously, if we ran eatFirstInt() 2 times on the string "1,2", we'd
get:

1
0

Now we should get:

1
2

As expected. This means we don't need to append a separator to a string
before parsing it.
Clean up usage of eatFirstInt and eatFirstString
Implement toRGB and toRGBA for color parsing
Rename "eat" functions to "pop" functions
Merge pull request #1001 from dorkster/parse_tools

Improve usage of file parsing utilities
No need to translate filename
Merge remote-tracking branch 'upstream/master'
Merge branch 'books' of https://github.com/dorkster/flare-engine-next into books
Use book attribute for items
Try to fix text align
Save consistency with flare-engine 1.0 code
Merge remote-tracking branch 'remotes/upstream/master' into books
Merge remote-tracking branch 'upstream/books' into books
*Fix build after merging remote-tracking branch 'upstream/master'